If you compare the salaries of US citizen with Chinese citizen then you can see huge difference in the minimum wages.Of course US doesn't have huge amount as minimum wage but still they are far like 10 or more times than average pay in those countries you mentioned. What China did is created more employment with very low pay so everyone can work which will help their government to become better in economy as well.
Interesting tidbit about Chinese propaganda, they are everywhere so you should be careful. Chinese do not really pay a lot of money to everyone, but not because they can't afford to, they just gather all the money in CCP and that is the problem.
If you look at the numbers, you can see that minimum wage of China is not that bad at all, obviously not as high as USA but USA is one of the richest nations in the world with quarter of the population china has, even less than that; it means China on paper looks fine, but that is on paper.
If you have seen anyone in china and how they live, you will realize that they are doing a lot worse than what they suppose to on paper, they are not getting paid as the minimum wage, and there are literally slaves in that nation as well. So, you will find a lot of people who will defend it because they are paid to do so by CCP but the reality is that it is a nation with few rich and many poor and that hasn't changed in the past 100 years.
I do have some friends from China who currently migrated to other countries for better life style. I can vouch what you said, most of the people in that country live like a slave but government claims that they were given decent pay to everyone. China is a country which developed in all the sectors but the standard of life for the people in China still remains low.