You hear people accusing their enemies of being morally or intellectually bankrupt, and they mean it in the sense of "destitute of, or wholly lacking (something)", rather than the sense of financial insolvency. But I actually would like to see the insolvency metaphor: people should speak of declaring intellectual bankruptcy to mean "I was wrong before; I won't try to defend my previous claims because I can't" (in analogy to "I won't try to pay my debts, because I can't").