not to mention the usual more overt discriminations like ethnicity, sex, and age; all can affect employment.

The Equal Employment Opportunity bureaucracy only deals with a very small fraction of what goes on and the NLRB is too high up to validate the most important "little" details that really do matter day-to-day, to help steer things in either a bad direction or something that is better for everyone. The RTW result is always way more expensive because it's also always way after-the-fact.

Under Right to Work there is NO objective OVERSIGHT in the work-place that is responsible for the most direct and effective responses to various kinds of discrimination.

You'd think that employers would be more interested in keeping government out of the work-place as much as possible by dealing with the problems associated with discrimination amongst those most affected by it, employees, who ORGANIZE to do the best things for their jobs and, therefore, for their employers AND for themselves.