Hello, I have been watching a number of movies about Domestic American life and I've noticed that Plumbers, Contractors, and food delivery workers are nearly always tipped or even paid for by acts of sexual intimacy. What's even weirder to me, a non-American, is that the payment often happens before the job is completed or even started.

How does your economy function if most contractors are paid this way? Are people really so destitute that they cannot afford food delivery?

What are the chances of being able to work in America as a successful Pizza Delivery worker, and what is the best way to avoid cheese burns?