Bankruptcy fraud is still a chargeable offense in the U.S., although I doubt we still apply the death penalty. Part of my old-book collection includes law reporters from the U.K. from the 1700s. I'll have to look for relevant cases. Lots in there about sheep, strangely.
Sadly there's no general legal basis for applying interest to a court-ordered debt. That would need to be established by statute and awarded by the court.
In general, when cash damages are awarded, the prevailing plaintiff often has no knowledge of the defendant's finances. But in some jurisdictions it's possible for the plaintiff to move for disclosure of assets, which—if granted—then proceeds with the defendant under oath to supply the information. But the actual collection is still the plaintiff's onus.
Ironically declaring bankruptcy as a means of escaping court-ordered debt forces the debtor to publicly list his assets, information that a plaintiff in that other cause wouldn't normally know. It's not always the best ploy for discharging uncomfortable debt.
There's a story, possibly apocryphal, about a state or county jurisdiction in which statute and judicial practice allowed someone awarded damages to seize outright whatever of the defendant's assets satisfy the debt without notice or further process. A guy had been awarded a default judgment in a small-claims case that the defendant never showed up to defend, and the plaintiff presented the order of judgment to the sheriff. The sheriff needed no further justification to enact seizure, so he and the plaintiff marched into the deadbeat defendant's place of business and just started packing stuff up.
Nowadays collecting a court-ordered debt has to follow the same debt-collection measures for due process as for any other debt.