Yesterday’s Sun-Times brought us the latest installment in reporter Dan Mihalopoulos’s ongoing investigation of how Mayor Rahm’s managed to make a royal mess out of the janitorial service contract at O’Hare.

That’s the five-year, $99 million contract the mayor gave to the bosses of United Maintenance Co., Inc., to clean the airport.

Well, of course, United Maintenance’s bosses won’t be the ones actually mopping the floors and cleaning the toilets. They’re hiring people—who’ll get about $12 an hour—to do that. Which should leave the bosses themselves a nice chunk of change.

Ah, the joys of privatization . . .