The capitalist, libertarian dream of free-market economies really only works if consumers have as much power as the businesses. When there is no transparency consumers get suckered into deals with companies that overcharge and businesses are rewarded for being inefficient and controlling of the market. They have excess cash to dominate their competition which is antithetical free market economies so loved by libertarians. Lazy, inefficient companies should be punished in the market, upstart competitors should be able to outdo them and grab market share. Companies should compete, efficiency should increase.
An example of this in the US is the multi-billion dollar insurance business - it appears that customers doing business with some of the biggest and most powerful insurance companies are drastically overpaying for their insurance.
This chart from the Lifehacker article You're Probably Overpaying for Car Insurance shows that customers of Farmers Insurance are 87% likely to be overpaying.
I might feel smug about that because I switched from Farmers a couple of years back. However, it turns out I only switched from Farmers to Travellers in the #5 spot and 77% of Travellers customers are overpaying. Granted it doesn't actually mean I'm overpaying just that I'm more likely to be. However at the bottom of the chart less than one third of GEICO customers are overpaying.
If nothing else if you're with one of the companies near the top of this list you might want to consider shopping around to see if there are better deals. Some example places to do this would be NerdWallet or Insurify. I'm sure there are others - yay for consumer transparency right?