Who he owes money?
He owed money to people who were doing a job of posting for a signature campaign that he manages. They are promoting a business in their signatures for a fixed rate. That's what we call a job. When you mow a lawn for your neighbor it's also a job. You don't need a written contract for that.
When would you small minded fucks will understand that signature campaign is not your permanent job that you're hired on a contract?
Job
1. countable noun
A job is the work that someone does to earn money.
A job is a job, a contract job is a contract job.