This is a nice point from The New York Times:
The argument against unions — that they unduly burden employers with unreasonable demands — is one that corporate America makes in good times and bad, so the recession by itself is not an excuse to avoid pushing the bill next year. The real issue is whether enhanced unionizing would worsen the recession, and there is no evidence that it would.There is a strong argument that the slack labor market of a recession actually makes unions all the more important. Without a united front, workers will have even less bargaining power in the recession than they had during the growth years of this decade, when they largely failed to get raises even as productivity and profits soared. If pay continues to lag, it will only prolong the downturn by inhibiting spending.
I'd only add that the last great leap forward for unions was during World War II, and the last great expansion of the American middle class followed in its aftermath. In contrast, the most recent expansions -- which have largely occurred in the absence of unions -- have benefited America's rich. Unions do not change economic growth, or at least there's little convincing evidence that they do. The countries with the world's highest growth rates -- the Nordic economies -- also have some of the world's highest rates of unionization. Denmark, Sweden, and Finland all approach 80 percent. Rather, unions change the distribution of economic growth. They direct more of it to the middle class and less of it to the executive class. The past few years have been an economy driven by the executive class. The question is whether that's what we want the next expansion to look like, also.