Being able to listen in makes it too easy for criminals to plan work and then listen out for the police getting on to them to make their getaway. Drug dealers would suddenly all be kitted out with the ability to listen in to evade being caught in the act.
I'm pretty sure he's "spent" the rest and that's all they could find so yes he's probably not going to be too bothered about the next 5 years once he gets deported back and picks up the rest of his salary he hid so well.