union advocates on the level of countries as a whole.
In that case, I would say that China is an example for unions (not so much for Socialism w Chinese characterics tho).
The country got massively richer over the last 3 decades. So, what would you expect, people overall have gotten richer. The causation link to lack of unions is very weak.
It is quite unequal, with a rather high GINI coefficient. So even though the country has gotten richer, workers didn't benefit all that much...
Worker conditions can hardly be considered ideal, with reports of long hours working in dormitory-style factories.
Its coal mines are some of the deadliest in the world. Now, one place where I really do support unions is ensuring safety for workers.
Analysis Of National Coal-mining Accident data In China, 2001–2008 - PMC
The risk for coal-mining accidents in China is one of the highest in the world. According to a 2003 government report, the coal miners' death rate per one million population was about 37 times that of America's coal-mining death rate.1,2