There is only one way to give your children advantages (conferring actual wealth aside, obviously), and even in today's up-is-down society, there is no shortcut. Spending time with your children, caring for and teaching them. That's it.

Notice how a lot of non-white cultures get that better than anyone. Teaching children that whoever whines the most can overcome this is damaging to them, but I have some faith that kids are smarter than that.