Single payer will reduce abortion because it makes planned parenthood easier through preventive care, which is a feature of universal health care.
It will reduce outsourcing because companies will have much less expense for health care, even including taxes for single payer, thus making them more competitive with overseas companies that don't pay for health care.
It will reduce crime because mental health, preventive care and addiction counseling will all be included as part of preventive care. People will be less stressed and less likely to be abusive through addiction to drugs like alcohol and nicotine.
So if your single most important issue is any of the above, devote your efforts to single payer instead, as it will make you efforts the most effective.