Is abolition possible under capitalism?

I think I agree with Robin D.G. Kelly that we can work toward and organize for abolition under capitalism, but that abolition itself also requires that capitalism be abolished alongside the police and prisons. Capitalism needs police and prisons to absorb surplus populations and as a means to keep proletarian unrest under foot. Capitalism cannot survive if prisons and police are abolished. Likewise, police and prisons need the wealth expropriated from the working class in order to maintain the police and prisons, as these things do not produce value in of itself.