People from all social classes produce social problems.
Still, most of the social problems - crime, addiction, delinquency, family disorder - are caused by the poorer half of the population.
I think it is true that people in the poorer half of the population are more disordered and problem causing. One big reason for this is that leading a disordered and problem-causing life tends to leave you poor, no matter how you started out.
There is another reason that the rich create fewer social problems. The rich can use money to treat their personal problems and to compensate for the consequences of their personal problems. The rich can use money to keep their personal problems from becoming social problems.