Labor: The attack on unions is an attack on the middle class

Unionized workers earn more and get more generous benefits. In 2010, wages of workers in unionized manufacturing companies in Indiana were 16 percent higher than in nonunion plants. One study concluded that the decline in unionization since the 1970s is responsible for one-fifth to one-third of the growth in inequality in this country. Voters, unionized or not, should recognize the new "right to work" push for what it is: bad economics and cynical politics. -- New York Times editorial (2012-01-07).

See, also: Working hard to make Indiana look bad: The tortured, uphill case for ‘right-to-work’ by Gordon Lafer (Economic Policy Institute 2012-01-03).
Unions, Norms, and the Rise in American Wage Inequality by Bruce Western and Jake Rosenfeld (Department of Sociology, Harvard University 2011-03).

Update:

Collective bargaining…has played a major role in America’s economic miracle. Unions represent some of the freest institutions in this land. There are few finer examples of participatory democracy to be found anywhere. Too often, discussion about the labor movement concentrates on disputes, corruption and strikes. But while these things are headlines, there are thousands of good agreements reached and put into practice every year without a hitch. -- Ronald Reagan (New York Times 1981-09-04)

quoted in It's Scott Walker's Party: How anti-union zealotry defines GOP race by John Nichols (Nation of Change 2012-01-09).

See, also: Republicans Douse ‘Light of Democracy’ and Ram Through RTW Bill by Mike Hall (AFL-CIO Now Blog News 2012-01-10).