The same way you justify progressive taxation, I suppose. Moreover, the government already does many (other) blatantly immoral things in the name of the (expect

The same way you justify progressive taxation, I suppose. Moreover, the government already does many (other) blatantly immoral things in the name of the (expected) results. But I am less concerned with the morality of it and more concerned with the practicality. If the children of the rich do start suffering, they will simply pull their children out of the public schools, putting you back at square one.