Thanks to you & iPwn for the answers & comments, I had to laugh at the last quote as that one is easily answered as we have the same problem, governments can't afford the costs of building new gaols (Jails) & running them to accommodate the increase of criminals.... hence why lot of them are fined, suspended sentences, let off etc.
Yup. I'd be all for letting people out of jail who were simply using drugs (not dealing) if it'd be traded for putting those who are found breaking the existing gun laws into jail.