unless they have government regulations in place to keep would-be competitors from the entering the marketplace.

I believe that since the financial crisis in 2008, people have been afraid that companies will become too big to fail and that even one is in danger of going under, that it will be rescued by government measures and compensated for by austerity policies for individual citizens.
Another fear is that individuals who want to set up their own business will not be able to compete with a corporation and that the retail sector - with the exception of the food industry - will die out as a result. The reason, they say, is that retailers can't keep up with the prices of the big players. I think what people fear and also reject is that when it comes to competition, they only see those who have enough power and influence themselves as capable of competing, which in turn makes the individual entrepreneur with a shop, for example, a dying species. But perhaps this has always been an illusion, even when the grocery or general shop was still common when it comes to pricing.
As far as the media are concerned, for example, it is said that the public media organisations are a monopoly in our country. We pay a compulsory tax for public service media. How would you see that?