Also, we shouldn't forget that since the economic reform of 1978, China has adopted the policy of intentionally escalating wealth inequality. Please do not forget billions of worker/farmer in China still live in a third world condition, so that the upper 10% can live their bourgeois life.
So are you challenging trickle down economics? That's debatable. I believe at least at the early stage capitalism trickle down economics works. However, without proper checks and balance system, corruption brought by power and wealth does stop the trickle down effect. Therefore in China where corruption is an accepted norm, it's doomed to fail. That was not originally planned though. Maybe that's also why recently th…
What is the basis of your belief?
I hope you understand that there is no thing in economics called "trickle down economics" or "trickle-down theory". It was term invented by Will Rogers as a joke to mock tax reduction policies that benefit the rich. Conservative politicians and pundits adopted this non-existent theory meant to mock them and magically people started to believe that it's a real theory that exists.
Only evidence of tax cuts helping comes from tax cuts for the poor who spend the money and don't invest, thus increasing the economic activity. https://www.journals.uchicago.edu/doi/abs/10.1086/701424 Trickle down has no evidence or theory to support it.
There is related real concept called supply-side economics, but it's also widely discredited by economists, including those who worked for Reagan like Mankiw. I think only handful of economists support it today.