does this mean that salaried employeees have to work as many hours as the employer asks you to
This answer should not be considered specific legal advice, nor does it establish an attorney client relationship. At will employment means that in absence of an employment agreement or collective bargaining agreement, your employer does not need a reason to fire you, although you cannot be fired for unlawful reasons, such as racial discrimination, etc. Being a salaried employee is a different issue, although it can be related, but if as a salaried employee you are properly classified as an exempt employee, not subject to being paid overtime, then your employer can require you to work as many hours as needed. However, if you are improperly classified as an exempt employee, then your employer may be liable for overtime.