Its not impossible that with even with all of the inefficiencies associated with government action that its still the best course of action. Things like hydroelectric dams and national interstate systems spring to mind.

It should however be the last resort. Its an extremely blunt instrument. Private sector vs government; To quote my favorite author: "Its the difference between using a feather and using a chicken."

not at all... medicare is cheaper than private insurance because hospitals that receive public funds are required to accept it. In that case, private industry (and you and I) are subsidizing medicare. That doesn't equate to well run