The title means that businesses know exactly how to pay their vendors and all the bills
they must pay but when it comes time to pay for the service of an employee's labor they
suddenly think the employee should want to do the job for free, or for little money, or for personal enjoyment.
They treat the job as gift that they will bestow upon a deserving person and they don't see your labor
as any other good/service which they must pay for when running a business.
While I fully agree with the sentiment here, getting all that from the title and the comic is a bit of a stretch. We don't all live inside your head, dude.