I think geography will continue to matter a lot when it comes to the subsidy question.
So long as the operating room remains every hospital's cash cow, the bean counters will be motivated to keep anesthesia coverage available. But to have leverage, there has to be a credible threat that the anesthesiologists will really, actually, truly LEAVE if their pay drops below a certain threshold. And I'm skeptical of that - it's clear from the people I know in real life, and from reading this board, that there are a LOT of anesthesiologists TODAY willing to earn $200K/year LESS for the privilege of living in the big city.
Out here in the sticks, where anesthesia coverage always seems to be squeaking by just to keep the ORs open, the hospitals pay large subsidies to the anesthesia groups and the pay is great. (Cost of living is low, too.) Those hospitals know if they don't cough up the money, the locums anesthesia guys will quit coming, and the ORs will shut down. They have paid and will keep paying the subsidies.
Honestly, I bet if the average tied-to-a-city anesthesiologist watched his salary go from $300K to $250K or $200K, he'd bitch & moan and go commiserate with the pediatricians ... but he wouldn't actually quit and move to Cowtown for a better wage. I'm really quite curious to see how those urban paradise hospitals play their hand when it comes to this issue over the next 10 years. (I'll be watching from Cowtown.)