There is no way it's going to be fewer than 10. Probably 30 if I had to guess.
My take, cynical at the root - unfortunately, is that "heads I win, tails somebody else loses" defines the low end of the premise; whereas the 100 years (times 5 for a good measure) defines the utter waste of the idea of rehabilitation.
We don't want people thinking, I can steal a billion and if I'm caught get out in my 30s.
When you give 100 year sentences, I'm not sure what you are doing other than feeding the public's vengeance.
> Probably 30 if I had to guess.
So he'd be in his 60s and with billions USD stashed. Can you come up with a retirement plan like that?
Parole, shortened stay?
Or rather:
He'd be killed/die in the prison; surely he'll come out destitute like a newborn baby?
Polar options abundance.