PSA: If you ever lose your stack, like really lose it, and have to file for bankruptcy protection or deal with creditors in a legal context, please hire a lawyer who can articulate to a (probably older) judge how cryptography makes it impossible to recover your keys or you might find yourself in prison for contempt. This happens more than you think even outside the "crypto" context.
Discussion
as you can’t really prove that you “lost” them I can see how legal help is needed 😄
I've been thinking about how to deal with this a long time. I expect one day the government will have departments that monitor addresses associated with "lost" keys which, if moved, will trigger a violation of some kind of court order triggering an order to show cause for the person to show up in court and justify the moved money.
I should add, we're fortunate (sometimes) that the rule of law we have in the US doesn't require definitive proof in the cryptographic sense but can be established through credible testimony. Sometimes it's not a good thing, but I prefer this aspect of the law as is.