I ordered a sandwich at a deli. I was happy with the service so I took $5 from the tip jar to pay for the sandwich.
You're supposed to put money into the tip jar for good service. Why would you take it out instead.
I'm broke and I needed $5 to buy food.
That doesn't mean you can steal tips from people. What if the employee was also broke and needed that $5 to buy food? You should get a job instead so you can get your own tips.
Why would I need to work when I can get all the money I need from the tip jar?
The money in the tip jar is not for you to take. Once you earn some money from working a job you'll see how great it feels to pay for your own food instead of stealing tips to cover the bill.