Well put. As long as we insist that the most viable metrics are economic, things won't improve. Quality can be shaved, paychecks can be squeezed, headcounts can be reduced, pollution can be diluted, teachers can be dissed... all introduce hidden costs.
The only great teachers I had that stuck with their crappy paychecks were second incomes into households (a working spouse), retired military (so they also had a pension), and a couple of magnificent lunatics that knew they were getting screwed but cared too much about teaching to step away. Kudos to every one of them, but like that bad 'Karma' remark by Microsoft CEO Nadella, they deserve better.