They way I see it, really really rich people buy these planes, restore them, maintain them, keep them flying, display them, and thereby pump in cubic megadollars keeping aviation skills and facilities running. Anyone who wants to might be able to help. The alternative would be for the government to take over, spend millions on storing the aircraft and do nothing. The current system is keeps the planes flying. If they break them, they will pour more cubic megadollars into skills and facilities and fix them. It's all good and everyone wins.