Regarding Ebert's question about how much money the unions have stolen compared to corporations like Enron, if you include in the definition of stealing the tens of millions of dollars every year they throw at politicians their members don't support, I'd say they're in the same ballpark. At least.
(BTW, has there been any studies done of a correlation between body mass and slavish devotion to one-sided documentaries? Just wondering.)
And when corporations steal, they (and their principals) can be prosecuted.