Actually, speaking of Australia - as 20% of Australians are apparently descended from convicts shipped there from the UK shouldn't Austrialia be suffering from terrible levels of crime?
https://en.wikipedia.org/wiki/Convicts_in_Australia
NB As far as I can tell it isn't.... :-)
Being on welfare closes a vast amount of opportunities to people, which causes many to turn to crime.
Bring a criminal closes a vast amount of opportunities to people, which causes people to turn to welfare.