Hundreds of thousands of angry S. Koreans pour out to Gwanghwamun Plaza in downtown Seoul to call for the immediate stepdown of impeached President Park Geun-Hye over her abuse of presidential powers every Saturday around the end of year 2016.

After a stunning growth performance, all four dragons are slowing and aging. In the absence of drastic policy changes, they are facing relative stagnation, says Dan Steinbock.

In The Four Little Dragons (1992), U.S. academic Ezra Vogel argued that the four little dragons—Taiwan, South Korea, Hong Kong, and Singapore—were the newly-industrialized economies, which had followed Japan's export-led growth model to prosperity. Unlike major advanced economies, which established their position in a century or two, the four dragons made their mark in just a few decades.

Today, the dragons' world looks very different. There is a common denominator behind Hong Kong’s economic and political malaise, Taiwan president Tsai Ing-wen’s effort to lean on the Trump White House, South Korea’s mass demonstrations to impeach President Park Geun-hye, and Singapore’s Future Committee's attempt to accelerate economic growth.

Political friction usually follows aging and slowing. That’s the common denominator.

Some half a century ago, the four dragons began extraordinary rapid industrialization starting with Hong Kong’s textile industry in the 60s, followed by export-oriented industrialization in Lee Kuan Yew’s Singapore, modernization and export expansion in Kuomintang’s Taiwan, and Park Chung-hee’s South Korea. From the early 1960s to the 90s, the dragons enjoyed high growth rates. In the process, they leapt “From the Third World to the First” within one generation, as Lee later put it.

In 1960, Hong Kong, the first dragon to begin the catch-up, still led in average living standards; it was only 20 percent behind Japan, followed by Singapore, Taiwan and South Korea. But Hong Kong remained more than 30 percent behind U.S. In the weakest dragon, South Korea, living standards were barely 10 percent of those in America.

As the toughest phase of industrialization was achieved by 1980, little dragons were still led by Hong Kong. Although trade-friction between the U.S. and Japan was about to dominate headlines, living standards in Hong Kong were now only 25 percent behind those in Japan, but still 45 percent behind those in U.S.

Usually, most economies’ internal engines decelerate after industrialization associated high growth. However, the four dragons were in the right place in the right time and made the right growth choices. As China – the ultimate dragon – began its economic reforms and opening-up policies, the little dragons' went overdrive that supported their growth another three decades.

Today, living standards in all dragons, except for South Korea, are relatively higher than in Japan, which has been overwhelmed by economic stagnation. Intriguingly, living standards in Singapore are now on average 35 percent higher than those in America; which Hong Kong has caught up with as well.

But easy catch-up growth is behind.

In 2017, Singapore hopes growth of 2-3 percent, although analysts expect it to stay below 2 percent. Despite a strong last quarter in 2016, it is coping with economic malaise. Trade outlook is uncertain, due to new protectionism and regional tensions. Like Hong Kong, Singapore must also cope with the Fed’s hikes amid a tight labor market and softening property sector. It is seeking new growth not just in China and emerging Asia but via economic integration with Malaysia and Riau.

Despite improved prospects, Hong Kong ' growth is about 2.0 percent. Its future is overshadowed by political angst. Even more than Singapore, it is exposed to global liquidity swings, US trade protectionism and China’s rebalancing in the region. But unlike Singapore, Hong Kong has missed or continues to shun pro-growth integration opportunities. Failures in leadership are illustrated by the misconduct of former chief executive Donald Tsang and the weakness of his successor CY Leung.

South Korea’s growth rate has been cut to 2.8 percent, but economic momentum has moderated. Neither foreign trade, which is constrained by international environment, nor domestic demand, which suffers from indebted households, has been adequate to support strong growth. While rising inflation may generate a hike by the Bank of Korea, Seoul must cope with Chinese deceleration and U.S. protectionism and Washington could also target it for alleged currency manipulation.

Despite improved forecasts, Taiwanese growth rate for 2017 is estimated at 1.8 percent. Like Hong Kong, it is struggling with economic and political malaise; the former derive from maturation, the latter are largely self-induced. Thanks to growing political uncertainty, investment contraction could follow in due time, especially if friction with China will weigh on trade and investment.

Today, dragons are steadily aging and slowing, as evidenced by steady and occasionally steep deceleration of growth in each.

The four dragons are aging. With demographic transition, birth and death rates are slowing, as evidenced by rise of median age. Among major advanced economies, it is highest in Japan and Germany (47), which are facing population decline. Among the dragons, it is highest in Hong Kong (43), followed by South Korea (41), Taiwan (40) and Singapore (40).

Worse, average living standards tend to mask broadening income polarization in the four dragons. Among major advanced economies, income inequality, as measured by Gini coefficient, is the highest in the US (45), but significantly lower in Japan (32), France and Germany (less than 30). Among the dragons, it is highest in the financial hubs of Hong Kong (54) and Singapore (46), as opposed to high-tech giants Taiwan (34) and South Korea (30).

In the long-run, high living standards require solid growth and strong productivity, which usually rely on sustained innovation. Most dragons are driven by technology innovation, as reflected by their R&D per GDP. It is relatively highest in the world in South Korea (4.3%), and in the top league in Singapore (3.2%) and Taiwan (3%), which have bypassed the U.S. and Western Europe. However, Hong Kong (0.7%) is the great laggard.

All four dragons need great structural reforms and inclusive pro-growth policies, including greater productivity, innovation and R&D investments; more dynamic competition and new enterprises; higher retirement ages, accelerated skill-based immigration, drastically reduced policy barriers to female labor participation; and greater efficiency of public spending. A greater stress on human capital also requires more progressive taxation, aggressive measures to reduce income inequality; and adequate job protection legislation.

Finally, as the dragons’ internal growth engines are slowing, they must aggressively seek greater integration opportunities, especially through greater economic integration regionally and international trading arrangements.