Also: if you want to see real corruption, just take a closer look at how regular small businesses operate. Befriend an employee of a grocery store. Or at a company selling lightbulbs, furniture, etc. I guarantee you from personal experience, your moral compass will go haywire from the stories you'll hear.

(Also, you'll unfortunately discover that a subset of customers are total assholes. These days I believe that working in a customer service, or other field that has you interact with a wide variety of people on a daily basis, is the best way to ultimately lose faith in humanity.)