Roads and bridges should be private, unless needed for national defense and not provided by private enterprise. Defense should be funded by voluntary means only, as all government should- i.e., lotteries, fee for usage (court, police, etc). Remember, we had no income tax in the USA until 1913 and did just fine. In fact, not long after we established the income tax and federal reserve (fake money), we had our first depression, the great depression.
The Constitution betrayed all these things- hence the insane, current federal government regulating where we go, what we say, what we eat, what we put in our bodies, what we trade, what we do with our own money, etc, etc. Tyrants, all of them. I hate them.