I very often, though, this is how privatization schemes end up working. The private sector takes over the most profitable consumers, leaving the unprofitable, c

I very often, though, this is how privatization schemes end up working. The private sector takes over the most profitable consumers, leaving the unprofitable, costly customers to the public sector. And realistically, if a voucher policy were implemented, it is unlikely that it will be perfectly designed. Unfortunately public policy is not driven entirely by well designed models.