Does "whatever it wants" include making contractual promises and then breaking them? Because I wasn't aware private companies had the right to rescind contracts at will.
Well legally speaking in the US they do have that right.
Aha. What are contracts for, then, exactly?
No such thing as a contract in an at-will employment setting. The company can fire you at any time. They can amend your employment terms at any time. You can quit at any time.
Lots of spineless throwaway accounts in these threads