It's also invidious because it values people based on the money they earn (an argument that I've had people very seriously argue to me). It makes a mockery of "all men are created equal," the foundation of our political and social institutions, not because we've ever treated that as more than an ideal, but because it argues against the ideal itself in solidifying the advantages and perquisites of the powerful. Which is what's really behind the "toxic myth."
Robert Reich: “Paid-what-you’re-worth” is a toxic myth
The former secretary of labor explains how this line of thinking keeps minimum wages (and the American people) down