Tony

You can imprison them cheaply by a wide variety of means.

1.  Make the conditions spartan....no need for rugs or TV's.

2. Make them work inside doing Mail bags or whatever. You see chain gangs in America, so why not here.

These stiff sentences may be expensive in the short term but I would guarantee that the number of offenders would plummet when that sort of sentence is handed out and hence we would have less cons inside.

Regards

Mick