Even if there was a zillion prison places available they probably wouldnt see it as a likely consequence, or even give a shit... it aint exactly bread and water and breaking rocks in them anyway.
Especially once they've been inside once and see that : loss of freedom/contact with their mates or family aside, its probably not as bad as all that after all, or as bad as they feared. Usually its the unknown that causes fear and if they know its not too bad theres even less incentive to stay out of trouble next time
Fuxsake, some little twats even wear it as a badge of pride / brag about "ive been inside" .
Big wow hardman
Then plenty have the gall to bang on about their human rights being violated / threaten to sue etc.. well you know the answer next time if you dont like it ~ dont fecking go back again!
Also, some people have such shit living conditions / no-one who gives a shit on the outside they'd
rather be in the nick! Roof over their head, 3 meals a day and seeing their 'mates'
My God, I know i'll sound about 90 years old saying this but if me or my brother had have even been within a sniff of getting in any trouble even half the severity of what those little bastards get up to, and think is ok, then my Grandad would've...well, I cant even bear to think what would've happened to us, he'd have bloody brained us