The evidence is profits increasing faster than inflation and examples of C-suites saying straight up that this environment is letting them raise prices.
The story is that when inflation is low, consumers are more intolerant of price hikes. They'll shop around and try out your competitors. Evidence to support this sentiment analysis is the myriad ways companies sneakily "hike" prices. Shrinkflation for example. When prices seem like they are going up on everything, what's the point of shopping around?