The challenge with that is if you can't get the Department of Labor to institute this (under a favorable administration), Congress is mostly deadlocked until the makeup up representatives turns over (through voter turnover). Alternatively, you could target enough states to pass this law that it would be useless to avoid listing your jobs in those states, as you'd be excluding excessive candidates from your candidate pool.

California, Oregon, Washington state, Illinois, Minnesota, and New York would be ideal next states to push this legislation. Texas and Florida would, of course, not be likely to pass such legislation although they each have large populations that would benefit from such pro labor statute. Turn the ratchet.