This is blatant socialism.
It's amazing that anyone would defend this by comparing it to the military draft in principle. I'm against the draft, even in principle. However, in times of clear peril to national security, a military draft is defensible, and after all, military service is temporary. Those who say that community service is appropriate because of government benefits we enjoy, should know that those benefits aren't temporary. There will always be plenty of justification to expand a civilian community service corps, and to lengthen the service, and to pile on the civilian's "obligation" to the state.