Carolyn Walker said she has been cleaning the convention center for 13 years. She had been making $8 per hour until a few years ago, when the cleaning contract went to another company, Cleanevent USA. The new company meant a new, downsized paycheck. She's now making minimum wage -- $7.67 per hour. But that wasn't the only hit to her wallet.

Walker said the company charges her $6 per week for uniforms. "It stinks to tell you the truth," she said. "We work very hard." It effectively means she's making less than Florida's minimum wage.

Larry Gilmore, 32, and Jean Baptiste, 27, recounted similar hits to their paychecks by Cleanevent. Baptiste said he's charged $11 per week for uniforms -- a thin blue short-sleeve shirt and dark pants.

As Rep. Paul Ryan delivered his acceptance speech on Wednesday night, Baptiste wheeled his giant can through the convention center, picking up trash left by reporters from The New York Times, CBS, The Huffington Post and other media outlets. All you heard in the massive room was Ryan's speech and the wheels on Baptiste's plastic trash can. He said he had only one complaint about the work. "It's good," he explained. "I just wish they paid more. I can't keep up with the rent."

Baptiste's rent in Tampa is $575. His electric bill can be as high as $160 per month. If he wants to park near the convention center for work, he -- and the others -- said they would be charged for the privilege. Baptiste said he does not use that parking garage.

Asked about the details of his paycheck, one worker, who refused to give a name, replied "So much money for the haves and so little money for the have-nots. I want you to note that distinction."