Then you've already yielded the difference in practicality. Executing or detaining a person for life is less practical for the government to do in western countries (and even most shitholes, as ungovernable militia back regions would resist such violence) than seizing your titled or banked assets.

The mere fact you've delayed the use of money doesn't mean the value is gone. I can't do dick with my money until I've at least logged into amazon or driven to the local walmart, yet it's value remains, of course the longer I have to wait to spend it the worse it is. The time value of money means its less valuable to me if I'm locked up for decades before I can get it, but even in jail indefinitely I could secretly reveal it to a friend who could share the money to get some nice ramen packets or cigarettes.