Is the next step for private concentration camp operators to start renting slave labor to business (agriculture, abbatoirs, …) for profit?  Convert a cost to a revenue source.  This solves the government's problem with farmers, etc, who have lost their cheap labor source and are pushing back on the migrant round up. There's plenty of precedent: for-profit prisons currently do this to a limited extent, and of course we have the Nazis as examples.