Each living, breathing thing existing in a system has a value in that system. That value should be accessible to rational actors living in the system.
Conservatives say public schools are cost centers. We need to stop spending so much money. So they privatize the education process and they (we. I was on the privatization bandwagon for education once) discovered that adding profit to the cost of existing schools added (surprise, surprise) added to the total cost of a child’s education. Only non-profit schools make a difference in real outcomes, the quality of the education obtained; and they still need more money.
So adding funding to schools will benefit the schools and the children. I suggest we do this by directly paying parents to raise their children. This all amounts to just another UBI argument for me.
It is another myth that government is funded by tax revenue. it is true that state governments have to balance tax revenues with projected outlays, and they do this because they don’t (and probably shouldn’t be allowed to) print their own money. But this is not true of a national (or world) government that controls the amount and distribution of currency. They can quite literally print money all day, every day, just so long as no one ends up with so much money they crash the system; the method of keeping money from accumulating in too few hands is to levy taxes on their excess wealth.