So if the government went out and choose an incompetent contractor that provides shoddy service and products, that's an example of the free market in action? Are you guys for real?
Why wouldn't it be? Are you for real? Where does competence enter into a free market interaction?
Free markets tend to punish the incompetent.
Government may or may not because governments don't need to make people happy to endure. They can point guns at people to get their money. No particular need to keep customers happy to survive.
Aramark has corporate clients as well. If they did this to their corporate clients, or otherwise made them unhappy, they would be shitcanned so fast it will make your head spin. The people that were responsible for hiring them and/or managing the contracts with them would also face a decent probability of shitcanning or being put on an undesirable career track.
But somehow evil greedy Aramark operates thousands of corporate cafeterias and we have no horror stories about them.