The public pension system has evolved into a complex and arcane bureaucracy over the decades as it was influenced by public sector employee unions, which are some of the best-funded political lobbying organizations in the nation:
And this goofy claim of yours needs to be clarified, as well. From your link:
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Heavy Hitters: Top All-Time Donors, 1989-2014
This list includes the organizations that have historically qualified as “heavy hitters” — groups that lobby and spend big, with large sums sent to candidates, parties and leadership PACs. Individuals and organizations have been able to make extremely large donations to outside spending groups in the last few years. While contributions to outside groups like super PACs do not factor into an organization’s designation as a “heavy hitter” (a listing of about 150 groups), those numbers are included for the roster below.
For example, this list does not include casino magnate Sheldon Adelson. He and his wife Miriam donated nearly $93 million in 2012 alone to conservative super PACs — enough to put him at No. 2 on this list. Similarly, the list excludes former New York City mayor Michael Bloomberg, who has donated more than $19 million in the past two years, largely to groups that support gun control. Neither Adelson nor Bloomberg — or the organizations they report as their employers — qualifies as a “heavy hitter” under our current definition. It’s also important to note that we aren’t including donations to politically active dark money groups, like Americans for Prosperity, a group linked to the Koch brothers, or the liberal group Patriot Majority — because these groups hide their donors; see a list of top donors that we’ve been able to identify to such groups. We are working to revise this list to take into account the new realities of campaign finance created by the Citizens United decision, but as it currently stands, there are significant omissions.
It is also worth noting that certain organizations, such as ActBlue and Club for Growth, are included although they function for the most part as pass-through entities: individual donors give to them with the contributions earmarked for specific candidates.
