I disagree.

The American government created a lot of various incentives to encourage ownership to a greater percentage of citizens compared to other countries at the time, including giving out free land, building infrastructure to develop new land, and creating programs which put people into homes that they owned.

That government support in young adults to establish themselves economically has significantly shrunk over the past generation. We've also seen an increasingly divergent economy where the split between haves and have nots have only gotten bigger.

A working class American in 1950 could claim that they were better off economically than the rest of the world and be right. That claim is no longer valid.