You don't pay back your parents. You can't. The debt you owe them gets collected by your children, who hand it down in turn. It's a sort of entailment. Or if you don't have children of the body, it's left as a debt to your common humanity. Or to your God, if you possess or are possessed by one.

About Lois McMaster Bujold

Lois McMaster Bujold ( boo-ZHOHLD; born November 2, 1949) is an American speculative fiction writer. She has won the Hugo Award for best novel four times, matching Robert A. Heinlein's record (not counting his Retro Hugos). Her novella The Mountains of Mourning won both the Hugo Award and Nebula Award....