Huh? Why would someone's financial status cause them to commit crime 
It depends in part why they are impoverished. Also, this may depend on the crime itself. Some people living in poverty have lost all hope and believe they have nothing to lose by committing a crime, say of theft, for example. Also, some people who live in poverty choose to blame others and not themselves for their situation. This can lead to them believing the other folks causing their poverty, deserve whatever they get.