Most countries solve this by requiring hospitals to be non-profits and making insurance non-existent or also non-profit.
Source: https://www.kff.org/other/state-indicator/hospitals-by-owner...
All this ends up meaning is that any revenue above their expenses is plowed into hiring more and more administrative staff and building new facilities.
Big salaries, perks, and bonuses to executives is just fine.
Sure they do. They have revenue and expenses to manage just like a for-profit business does.
> I've read a few things that indicate non-profit hospitals are full of fiscal bloat, because there's no incentive to act otherwise.
This is not unique to non-profit ones.