It's all in how it is reported,,,,,
The chart show unions spending $600 to $800 million per year 08' to 11'http://online.wsj.com/news/articles/SB1 ... 4031850026
The hours spent by union employees working on political matters were equivalent in 2010 to a shadow army much larger than President Barack Obama's current re-election staff, data analyzed by the Journal show.
The usual measure of unions' clout encompasses chiefly what they spend supporting federal candidates through their political-action committees, which are funded with voluntary contributions, and lobbying Washington, which is a cost borne by the unions' own coffers. These kinds of spending, which unions report to the Federal Election Commission and to Congress, totaled $1.1 billion from 2005 through 2011, according to the nonpartisan Center for Responsive Politics.
The unions' reports to the Labor Department capture an additional $3.3 billion that unions spent over the same period on political activity.
The costs reported to the Labor Department range from polling fees, to money spent persuading union members to vote a certain way, to bratwursts to feed Wisconsin workers protesting at the state capitol last year. Much of this kind of spending comes not from members' contributions to a PAC but directly from unions' dues-funded coffers. There is no requirement that unions report all of this kind of spending to the Federal Election Commission, or FEC.