Just, out of curiosity, let's say the road system is privatized. You'll have competing companies owning roads and charging toll. At first, if you like one road more than the other, you'll have a choice to avoid the poorly performing company. But, eventually, the better performing one will be able to buy up more and more poorly performing ones around your area. When it gets to the point that there is only one company servicing all roads and charging you for their use, you're pretty much stuck with a monopoly, having to pay one organization if you want to drive anywhere. So... how would that be different from being forced to pay the government? (You could take public transportation, but you'd be paying indirectly, or you could stay home... And yeah, there are issues with construction crew unions and no-bid contract corruption, but who's to say that also won't happen with a private monopoly?)