> They can really easily do that though. A court can say "give us your keys or you are going to sit in jail until you do and we will record your conversations so if you tell the keys to someone else, we'll sell them"

So? If sums is high enough they STILL can't confiscate it. In some cases it is preferable to spend some time in jail versus giving up outrageous fortune. They still can't take it by force. Also, only a few countries with backward laws (like the United States of America) have laws that allow that. Something insane like what you propose would never be possible in a developed country with a solid judicial branch like Estonia, for example.