In all honesty I'd probably do the same as dragonella if Mr Wench did the same. Not kick him out but he'd be in the spare room and his life would be hell for a bit.
Not only has he cost them money and inconvenience but he put his own and others lives at risk. Do plod have better things to do? Yes they absolutely do but getting in to a car when you've had too much to drink is inexcusable.