Many of them however never could've expanded the way they did without govt. subsidies of some sort though. Either in terms of land, tax deductions, and/or cash payouts from the govt.pretty sure those industries started as wholly owned and operated business...
The exact opposite is usually true actually.subsidies are a way for big government to get their hands in the pie and begin to dictate the actions of private business
Many of these private companies would lobby for govt. subsidies and then get to pay little or nothing back to the govt. so long as they were willing to provide some politically useful actions to the rollouts of their product or service.