I think most indie developers (assuming that they are full time) can attest to the money problem that come with devoting your life to something you love as much as video games.
it is fair to say that I love video games to an almost unhealthy degree. Even though I am completely broke, I spend most of my money on games and I make sure that the job that I hold allows me time to devote to development.
In fact, I let the whimsey of videogame development control most of my life, despite that fact that I have never made any money off of my own games.
That said, I can’t imagine allot of indie dev make games for the cash of the thing, since I know more broke developers than I know ones with work. I think, we as a species, have devoted ourselves to this interactive business and the love of the things carries us through, even when we have to eat ramen for every meal.