This isn’t a politicians issue - well, not directly and one of the few that isn’t their fault.
Politicians have to be voted in. Any that tries to increase rates, costs or taxes gets voted out. Its not them - its us voting for our own interests… pretty good prisoners dilemma application actually. If every politician increased the costs we would all be better off - better educated students, more engaged teachers, follow on effects of lower crime and better work prospects - but if 5 potential have it as their platform and the 6th reduces the cost of living who gets in?
Better paid teachers would help that.