Hey, this is fun. I can play this game too. See, the goal of the pro-private school side is to suck as much public funding out of the public education system as possible. Then conservatives can point to a poorly run system they helped create while propping up the for-profits. (remind anyone of how conservatives govern? Ruin government then point to how ineffective government is and how private business is the solution). This is easy to see on the local level, with conservatives getting elected to the school board and immediately slashing school funding (See: Barre). That shitty school system helps keeps the populous dumb, aka easier to control, while also filling the pockets of the already wealthy using tax dollars for private schools.

Conservatives are incensed that they may have to send their kids to the same school as the poors so they want their own fancy schools while also getting the public to pay for them. And they are banking on enough of the population already being dumb enough to let them get away with it. Their kid gets nothing but the best, while the rest are left as dumb as possible so they can be whipped into a frenzy over "groomers" or "illegals" or whatever other existential "threat" of the day to keep them occupied.

Much like "the beatings will continue until morale improves," here we have "the funding will diminish until educational outcomes improve." Both make as much sense and get the expected outcome.