Here is my view:
Allow inner-city entrepreneurs to hire people on welfare and pay them only a couple dollars per hour, so the $$$ amount that they pay is only the difference to bring them up to the minimum wage, or slightly higher, and allow the workers to keep their welfare checks and medicaid. This provides some motivated welfare recipients an opportunity to learn how to work and make more than their welfare hand-outs. The entrepreneur gets a chance to start a business with little-or-no investment - eventually wean both off their subsidy.
In most of these riot-torn cities, welfare is higher than minimum wage.