公司可以沒有理由地解聘員工,與樓主所說的隨意減少合約工資無關。
At-will employment is a term used in U.S. labor law for contractual relationships in which an employee can be dismissed by an employer for any reason (that is, without having to establish "just cause" for termination), and without warning, as long as the reason is not illegal (e.g. firing because of the employee's race or religion).
(維基上抄過來的)