Taxes are not a majority program though. The way something like this would end up working is the kids getting 90's in high school and going to top tier engineer

Taxes are not a majority program though. The way something like this would end up working is the kids getting 90's in high school and going to top tier engineering programs would happily pony up the money along with a few other demographics that were confident in their earning potential. The vast majority of high income earners that pay the majority of taxes would disappear from the income system by having paid back just their costs. But the system needs the high income earners to pay more than one person's fair share. This would be a one time tax grab that would destroy the future tax base in a disastrous way.