Right to work states should be called, "right to work for lousy pay and worse  benefits states."  At the peak of union strength, the economy was at its best (as a rough generalization  -- of course there were boom/bust cycles.)  Labour laws do not ensure better wages and benefits, and Unions, though in decline in our neo-liberal, neo-conservative (take your pick) world, are demonized by the right.  Unfortunately the relationship between owners and workers is still basically adversarial -- owners want maximum profit, workers want maximum wages & benefits.  Without unions, owners hold almost all the cards.