I explitly talked about outcome being dramatically different. Children of wealthy people who have no motivation to contribute anything to the world, learn no skills, and are lazy, should not end up on the same level as hardworking skilled children of poor parents. They should end much lower. Barriers to this include enormous inheritances, the housing market (prices driven up enormously by hoarding and inheritance), the cost of university education, vast disparities in the quality of education available in different areas, and nepotism in the jobs market.

These factors are very different in different countries. I forget the name of the stat but looking at the percentage of people born to bottom fifth income parents ending up as top fifth income earners themselves is quite telling. If I remember right there is a dramatic difference between similarly "developed" countries. I looked and couldn't find the original data I read but here [0] is similar, showing denmark children born to bottom quintile parents reach top quintile 14% of the time (perfect unachievable meritocracy would be 20%), wheras in the US its 8%.

It goes without saying, but the reason it is important to point out that it is different between countries is to argue against vibes based arguments of people who just throw their hands up and say "oh but woe is us this is the natural way of the world why rage against nature it will always be thus" simply because they think that is the case without any data whatsoever. This is literally table stakes for even discussing the problem.

[0]: https://www.brookings.edu/wp-content/uploads/2016/07/02_econ...