Not sure how or where your post shows that unions/labor outspent capital/corporations.
Here are the top contributors from the FIRE sectors (from my previous link):
Top Contributors, 2011-2012
Contributor Amount
Goldman Sachs $2,110,292
Bain Capital $1,796,200
Paulson & Co $1,569,150
National Assn of Realtors $1,454,662
Bank of America $1,162,973
PriceWaterhouseCoopers $1,157,201
American Bankers Assn $1,128,500
Credit Union National Assn $1,097,125
New York Life Insurance $1,085,075
Deloitte LLP $1,005,621
Morgan Stanley $935,131
Wells Fargo $894,727
The Villages $885,612
JPMorgan Chase & Co $862,711
Credit Suisse Group $806,622
Blackstone Group $773,035
UBS AG $760,136
AFLAC Inc $757,800
Ernst & Young $737,375
Citigroup Inc $663,702
[edit: This is in response to the first of your most recent posts.]