Ask Chicago how selling off public infrastructure to private companies is working out. It's great for the first few years when you can spend that lump some on whatever feel-good projects that ask nicely (more money for schools? Sure, here you go!), but once the money is spent (which is quickly), we're all left with a decades of paying higher utility rates, tolls, parking fees or whatever fees associated with the public property that was sold off.
At it's effective level, this is just borrowing from the future, only it passes the financing cost directly off to the utility customers. It's no different than the boom of P3 (Private-Public Partnerships) contracts in infrastructure. The government has gone from paying as we go for infrastructure, or issuing it's own bonds (at low interest rates), to passing that borrowing directly to private institutions, which demand a higher rate-of-return.
The problem is, 2, 4, and 6-year election cycles encourage this short-sighted thinking.