Sending Your Kids To Overseas University?

Three stories of my colleagues who send their kids to overseas university.

Two of them sent their daughters to overseas university and wipe out much of their retirement fund. Both daughters never came back and their poor parents have to fly over to visit them as their daughters are too busy with their careers to visit their parents.

The third one has to down grade from 5-room to 3-room to raise money to send their son to overseas university and their elder son was quite fed-up with his parent's decision and asked: "Why should the whole family suffer because younger brother fooled around and didn't study hard?" 

If you have more than 1 kid, do you think it is fair to let one kid depleted most of the limited family financial resources?