Of course not......It does happen even today
But like every major change in History, it will take time, because this isn't some building that we have to demolish or some road we have to repair. We have to demolish these unequalities from the collective pshych of a population.......
However progress is being made. And we have to make sure progress isn't just or progress's sake, for we can ill afford any negative side effects........
What I mean to say is we can can enforce the right thing harshly on people, but that won't work in the long term..........
But steady, long term progress is being made nevertheless..........More people are marrying outside their varna, and even religion each year.Many Dalits are now high ranking officials and executives, while many Brahmins too work under them........