The "end date" will never arrive. If you told a set of people they can get seats at plum places doing 1/4th work the remainder of the population, and you did this with 4-5 generations of their populace, its impossible to do away with this sort of entitlement after a while.

And not to forget there will be enough politicians to fight for them as long as they vote for them.

These sort of things are pretty much one direction. Once done are irreversible. Its impossible to roll back what people think is a right they were born with.