It isn't whether you use private sector funds or not...its the regulatory regime you build around it.  A prime example is the natural gas distribution business in Ontario -  completely privatized but regulated by an independent body so that the monopoly granted is not abused and that rate increases are justified and reasonable.  The lowest cost energy option and not a dime of government money to build and run.  Highway 407?  Not so much.  Built with taxpayer funds, then sold and the new owners given carte blanche on any rate they want to choose and a guarantee of no competitive highways within miles forever.  If the government is smart privatization can be a real option.  If the government is dumb (Harris/Eves) and allows monopolies they create to exercise the power they've purchased, we all suffer.  Which is the Federal Liberals?