Legal Question in Employment Law in Iowa

Unless you have a contract of employment or are covered under a collective bargaining agreement employment is at will-which means you can be terminated for any reason, good reason or no reason at all. That means unless it is a matter of workplace discrimination-age, gender, race etc etc that violates federal law the employer can pretty much make up any rule they want to. Of course, your remedy is to quit. Isn't living in a right to work state fun?