Nonsense. That's like saying the United States political system's entire original intent was greed and corruption because of what it's like today. The greed and corruption of the Unions evolved over time along with organized crime and political pressures.
Despite all the jokes we like to throw around, neither politics nor politicians are inherently corrupt and/or greedy. Policies endorsed or enforced by politicians need not necessarily involve taking away from the people's bottom line. Unions on the other hand, operate solely for the purpose of judging how much money someone should give the party they favor.
Bearing this in mind, I maintain that, principally, unions have always operated with a greedy and authoritarian disposition
