I would say that depends on the type of business. All businesses are not created equal when it comes to things like requiring taxpayer subsidies to be economically viable or making large demands on public infrastructure. Internet commerce is one area that's grown tremendously without much if any support from government. In fact, it's probably grown bigger and faster than it would have if government had stuck its nose in the tent.
You are incapable of separating government from markets, on a large scale. And by you, I mean, humans in general.
It's not even just roads and internet, it's the entire market itself preserved through bloodshed in world wars, in anti-terrorist operations, but beyond that in things like funding R&D in all sectors of the economy, it's the education our potential employees received via government, in some cases fed and clothed by government, the air we breath, the enforcement of laws which enable us to effectively compete without violence, etc.
Woudl you have been born had your parents been exposed to the lead-levels that China had no issue with domestically? But even if we did away with all government today, it would not be free of the influence of government, it's a zero sum game. Besides, you may be a slave right now, had we not had a central government with balls to shut down the ignorant south. Slavery = freedom right?
Looking at government as some monolithic team of idiots is not realistic. A government in an authoritarian regime is entirely different, from top to bottom, than our representative democracy.
Free markets by themselves are irrelevant. Free markets coupled with a strong, representative government, is what catalyzed the massive increase in prosperity (and the virigin land and abundant resources and irrelevant treatment of of Native Americans). The thing that makes government in the U.S. so monumentally important is that to some degree, it's an extension of our collective will, tempered with politics, debate, corruption, do-gooders, etc. It's basically a vertically integrated firm of the populace, who found it kind of hard to defend their borders and compete with their neighbors without coordination.
Austrians can't justify a firm, no wonder they can't justify government, it's the same thing.