As Amity Shlaes observed in her recent history of the Great Depression, "The Forgotten Man," within a few months after the Wagner Act was upheld, industrial production began to plummet and "the jobs started to disappear, with unemployment moving back to 1931 levels," even as the number of workers under union control was "growing (astoundingly)."
Given the reality of unions in the workplace, the law meant that efficiency and (profitability )were (compromised), by forcing employers to equally reward their most productive and least productive employees. Therefore (subsequent) wage increases for some workers led to (widespread )job losses.
Pre-Depression-era growth and (prosperity) did not return to the private sector until the early 1950s, when the spread of state right-to-work laws (prohibiting) forced union membership and dues greatly reduced the (detrimental) effects of the Wagner Act.
The U.S. has just experienced another stock market crash, and Barack Obama, the (candidate) now favored to be the next president, is in favor of what amounts to a new (Wagner Act).