Duke, that is exactly the hole point, they WILL GIVE A SHIT when they don't mine with a profit.
No they won't. They will shut down their rigs and turn away. The few that remain will get more bitcoins per person, giving each of them even more influence on the market.
Why it is bad that a lot of coins are concentrated on a small number of people I don't think I need to explain to you, right?
I don't believe that, when the profits are gone we will have mostly miners that want Bitcoin to get big long term, and there are a lot of them. And also, this high inflation environment is a one time thing, it will be over in Dec of 2012.