Profit is a very visible figure with publicly run companies. When that figure is very high, say with oil companies, the public gets very upset and claims gouging. The way to show reasonable profit to the public is to dump that money back into the company through expansion, bonuses, gross salaries, remodeling and a slew of other ways I am unaware of.
If Wal-Mart did not expand across the nation like a swarm of locusts, undoubtedly their profit would be through the roof. We would then not understand why they brow beat their suppliers. Hiding profit from view is the name of the game.