Ubiquitin,
1. You need a remedial reading course. My point was that free enterprise lowered the prices.
2. You cannot. In a free market competitors would come and undersell you and you would be forced to lower your prices.
3.a. If there were no pizza the question would also not start. There is a heter iska and I could use it although I might not.
b. Yes. I may so long as I pay taxes and do not block your store. See Hasagat Gevul: Economic Competition in Jewish Law by Rabbi Chaim Jachter.
4. On the contrary. Crony capitalism is regulation for the benefit of the cronies.