While it is certainly true that every business depends on common use infrastructure, such as roads and bridges, it might be instructive to take a look at how those roads and bridges and other common use infrastructure actually came into being.
A private enterprise dug the gravel used for road ballast out of a gravel pit, using diggers and loaders and conveyors and washers manufactured by other private enterprises. Another private enterprise built the dump trucks that carried the gravel to the road site.
A private enterprise made the reinforcing bars, using plant and equipment built by other private enterprises, from the Bessemer furnaces that reduced the iron ore (using private enterprise supplied limestone and private enterprise supplied coke) to the rolling mills that produced the actual rebar.
The rebar chairs were made by a private company out of polyethylene plastic made by another private company in injection molding machines made by yet another private company.
A private enterprise dug the limestone for the cement out of the ground, and a second private enterprise built the cement kilns. A third private company bought the limestone and the cement kilns and manufactured and packaged the cement.
The pre-stressed concrete beams for the bridges were made by a private company and delivered on special trucks built specifically for that purpose by another private company. The paving machine that actually lays the roadway came from – you guessed it – a private company.
Private companies made the steel rails and the creosoted cross ties for the railroad that carried the rebar and cement to the railway station nearest the site, and other private companies built the locomotives and the rail cars.
The gloves and work boots and Carhartt overalls worn by the workmen were all manufactured by private companies.
All of these private enterprises, as well as millions of other private companies, created the wealth that the government taxed to get the money to pay the private engineering firm and the private sector contractor to bring all of this together into roads and bridges.
In short, it was private enterprise that built and paid for all those roads and all those bridges and all that other common use infrastructure. Did they do this for altruistic reasons? Of course not! They did it because – and only because – they, the private enterprises, needed roads and bridges and other infrastructure to facilitate the movement of raw materials, finished goods, and labor. The fact that they are common use is a bonus – a free gift from the private sector. The government's roll in all this was nothing more than an employee of the private sector, paid to disburse private sector funds (tax money) in the accomplishment of infrastructure that the private sector needed.
One of the beauties of the private enterprise system is that once private industry has built the infrastructure, anyone can use it – even those such as the government who made no contribution to the building of that infrastructure. Thus it is not business that depends on common use infrastructure; it is rather common use infrastructure that depends on business – to invent it, to construct it, and to maintain it. Common use infrastructure would not even exist if private enterprises had not built it to fulfill their own needs.
Government, far from being the source of private enterprise, is the paid lackey of private enterprise, retained to perform certain minor tasks of mutual benefit to the private entrepreneurial community at large and, incidentally, to the rest of society.