I don't think it's a great idea to take on a demanding job where people's lives hang in the balance if you don't have any interest in it. Most of the smart but directionless people I know either became corporate lawyers or IT people.
FWIW, my husband and I are downwardly mobile compared to our families of origin and are at about average for annual family income in the US, though I only work part-time. Technically, I think we may qualify for reduced-price school lunch. We both work in our chosen fields, neither of which pays much at all. (I used to earn much more, but I hated the work and quit.) I know quite a few bright people whose situations are similar to ours. High IQ and good educations do not automatically equate to high income. I always wonder if anyone is tracking kids like ours, who have a great deal of social capital but are technically middle-class or below.
