That’s what State Comptroller Leslie Munger has decided to do, according to the Chicago Tribune.
She reasons that other bills are more important to pay.

News of State Comptroller Leslie Munger’s move to spur legislators to pass a budget.
If Governor Bruce Rauner really wants to catch the attention of Madigan, Cullerton and the favored legislators who fly with them to and from Chicago, he could just ground them.

Would soon-to-be impeached Governor Rod Blagojevich have journeyed to Springfield to speak to the State Senate, if he had known he would have had to drive back to Chicago. How would shutting down free plane rides for leading legislators affect the equation between Govenror Bruce Rauner and House Speaker Mike Madigan?
Not enough money for fuel, don’t you know?
I thought Rainer stopped those flights a while ago. Did he start them up again?
Rauner – stupid autocorrect
Yeah I though so as well?
I think it’s a good move that she’s delaying their paychecks.
Somebody’s doing something!
This comptroller has some nerve!
GOOD FOR HER!