Is it Illegal for employers to discriminate due to tax liens?

If the person with the liens is employed in a "position of trust' within the company and the employer believes that because of the employees financial status that his trust in that person may be misplaced, or that his trust is in jeapordy, he may, at his discretion, take some kind of action to protect his interests. (Note: If you are employed in a "right-to-work" state, your employer can make any change in your employment he wishes, up to and including discharging you.).