OK but what does that have to do with paying back the cost of my own education?
For me it's not very important that there should be accurate accounting of such things. I just don't lose much sleep over tax money going to education because it keeps a virtuous cycle going. I didn't even grow up in the USA, but what my home country lost in direct tax revenue may be made up over the long run by increased international trade.
I really don't see any point in trying to exhaustively account for public goods at the individual level, which only results in more bureaucracy and promotes a penny-pinching mentality that is inimical to the undertaking of increasing public goods and economic development.
I certainly agree that funding for public education cannot be considered a repayment for some personal debt, which is why I objected to the comment I first replied to.