Not conspiratorial, IMO. “Control of the market” relates more to the location of refineries and the concommittent cost of shipping refined product. If no new refineries can be built....then the most local guys have a pricing advantage. So the effort to kill refineries is as much at fault as evil oil co monopolists. /s
I still don't understand how that explains a sudden increase in pump price in the face of steady declines in the price of crude oil. I assume that refinery location and shipping costs in Indiana haven't changed substantially in recent weeks. Maybe it is related to problems at the nearby BP refinery that someone mentioned.