yep , if they've got the means to pay , they pay (afterall; they'd be paying rent/mortgage on the outside)
if they don't or don't want to then they do meaningful work inside to pay their board and lodgings in kind.
Unfortunately i think the EU court of fluffy bunny cuddles ruled that this was against their basic human rights.
That aside i do agree that the two oxygen theives concerned (and indeed many other non violent offenders) would have been equally punished by being made to do 8 months equivalent comunity service picking up dog crap, shovelling slime out of ditches , or cleaning grafiti off walls with a nail brush - while wearing a pink boiler suit with " I'm a lying scumbag" printed on the back