CHICAGO (CBS) — A couple dozen protesters stood outside United Airlines’ Chicago offices on Sunday to demand that United do more for the city.

The protesters’ message: that United is making too much money to also get benefits from the city through tax increment financing.

READ MORE: Jussie Smollett Trial: Jury Could Get Case As Trial Resumes Monday

“The city of Chicago has given approximately $50 million to United Airlines over the past four years,” said Service Employees International Union member Annette Jones, one of the protest organizers.

LISTEN: WBBM Newsradio’s Steve Miller reports

READ MORE: Chaos In The Loop Leads To Shooting, Beatings; 21 Young People Arrested

The protesters brought a bunch of luggage and set it outside United’s headquarters on West Wacker Drive – symbolic, they said, of the burden United is placing on the backs of Chicago’s working people.

United has also come under criticism lately – along with American Airlines – for funneling their jet fuel purchases through the town of Sycamore, Illinois in order to avoid Chicago city taxes and saving millions.

MORE NEWS: LOCATED: Deanna Sirikul, 13, Reported Missing From Woodlawn

A spokesman for United Airlines has declined comment.