"Let Go" not fired due to being the highest paid ee. I am the Practice Manager and work well outside of the scope of my job description.

First of all, although I am not an expert on the law of every state, I am unaware of any state which is not an "at will state".  Absent a contractual provision to the contrary (e.g. "employee can only be fired for good cause" or "employee will be employed for a term of 3 years") or a statutory prohibition (e.g. a statute prohibiting being fired because or race, gender, age, whistle-blowing or other protected activities, etc.), an employee can be fired at any time, for any reason.