All of which makes $15 an hour sound too high. Hardly. Over the last half-century, American workers have achieved productivity gains that can easily support a $15-an-hour minimum wage. In fact, if the minimum wage had kept pace over time with the average growth in productivity, it would be about $17 an hour. The problem is that the benefits of... - <a rel="nofollow" href="http://friarw.tumblr.com/... ; title="http://friarw.tumblr.com/... ;