I think it's more ethical to get the funds back yourself rather than having the government do it. After all, it's pretty much the same thing, except that the government itself is funded with stolen funds.
Although, I think it would be less thug-like to hire a PI to confront Ukyo to find out what happened and determine his assets.
I mentioned this idea like 10 pages of whining ago. I will chip in for this.
Can someone find a pic of the guy? I think having a PI post his pic and detailed info here, as well as making a personal visit, will do wonders for Jon's attitude.