They should have to pay double.
Agreed!
That's a start, but the government agents involved don't care, because it's not their money, it's yours/ours. There should be serious career damage to government employees who do this sort of thing, along with the compensation you suggest.
People act as if "due process" exists when you can bankrupt yourself against the unlimited resources of the government in defense, and that isn't taken into account. In effect, the government, or a petty bureaucrat of the government, can find you guilty and fine you the cost of proving your innocence, or worse, with no risk. And, maybe it's a plus on their resume, too.
Not even close to enough.
The money, plus his normal rate of return, plus lost opportunity costs, plus any loans, plus interest he had to take out, plus mental distress, plus attorney fees....THEN triple damages because it was capricious and a gross misuse of power.
I would say, depending on the attorney time and effort, between $500,000 and $750,000.
They is us.