I don't think you've falsified the argument. Maybe you would have if economic growth and marginal tax rates are the only variables.
I think it's pretty clear that progressive taxes create negative incentives, particularly when it comes to encouraging people to get rich in the first place (which usually means starting a business).
> Further, equality of opportunity is surprisingly cheap over time. You end up with more capable workforce which pays for the cost of training it.
Yeah, the question is where to draw the line. Public education seems like something we definitely want. But if we truly want equality of opportunity, I don't think we can have communities like this:
> Schull is a very small community, couple of thousand max but there's been a lot of 'alternative' type immigration there from other first world countries, artists etc from places like England (eg Jeremy irons), Netherlands so its secondary school is pretty progressive afaik. They have a slipway to the bay right next to the school so the school does sailing classes etc. The planetarium in question is a stone's throw from the school. County Cork has a youth orchestra. Overall not the worst place in the world to grow up.
Everyone can't have sailing lessons and a planetarium.