[SuoDuanDao]

Society definitely doesn't benefit, I think we can afford massive inequality much more easily than reduced social mobility. That the richest classes have the option to 'pull the ladder up' behind their children is an indication that democracy is not delivering the results it should.

But I don't think there are easy fixes, because there's also intergenerational social mobility - working class parents going without luxuries to send their children to a better school etc. It's very tough to give poor-but-ambitious families means to improve their lot over a long time without already-wealthy families monopolizing those opportunities.