At the root of political corruption is money, lots of money.

[CrispyQ]

1. Corporations are the only non-human entity to have Constitutional rights.

Slavery is the fiction that people are property.
Corporate personhood is the fiction that corporations are people.

All other non-living entities, like labor unions, non-incorporated businesses, churches, civics groups, & governments, only have the privileges that WE grant them. Since corporations aren't living beings, they don't need clean air, fresh water, healthy food, health care, child/elder care, or even an environment that supports them. Corporations can "live" forever & their money & power amplify their rights. These artificial entities are the entities that a good number of Congress serves, not We the People.

Lot's of good reading here: Reclaim Democracy's Corporate Personhood page

Another good page of theirs: Proposed Constitutional Amendments