Changing social class has always been very difficult. The solution is to get rid of social classes. Or at least try to even out the difference between the lowest class and highest class.

> Changing social class has always been very difficult

It's been very difficult in part because 150+ years of Marxist tradition has not been able to define what a class is. Upwards social mobility by other metrics such as wealth and income, both intra- and inter-generation, is actually provable and real.