True capitalism should require a level playing field when you start, and to really do that, when the final score is tallied, the slate should be wiped clean.
No, true capitalism involves you deciding, for yourself, what you want to do with the money you've made. That might very well include giving it to your wife or kids, as part of what you intended all along as you worked 100 hour weeks growing a business.
To follow your logic, a successful parent shouldn't be allowed to send their kid to a better engineering school (which because of staff and facilities, costs more), because that's not a "clean" slate for the college student compared to everyone else. But since plenty of parents are lazy wastes of oxygen, the only way to even the slate for you would be to make sure that no kid gets a better childhood or education than what the kid with the worst possible parents get. There! That way everything would be "fair" for you.
And typically they're not for you and me, it's for people over a certain threshold (say $1 mio + in assets)
Yeah, I can tell you've never had a single conversation in your life with a family farmer. Or someone who's launched a business that's modestly successful. You need to get out more. Oh, wait. That might make you more worldly than someone else's kid, and that wouldn't be fair.