For the most part...Tipping is needed.
According to Business Today, tips should only be rewarded for good or superb service a customer receives. According to the American Society of Travel Agents in a Business Today article, 15 to 20 percent gratuity from the bill price is normal for restaurants. In big parties, 15 percent gratuity is already added for you. According to the same article, most waitresses think that 15 percent is a decent amount for waiting a table. According to Restaurant Gage.com, tips are the main income of the waiter or waitress. For some restaurant waiters and waitresses, the hourly wage is somewhere between $2-4. For anyone this is not enough, which is why tipping is such an important part of the job. Without tips, people probably would not have enough to pay for anything.
On the Pizza Driver Homepage, it states that the minimum tip for a pizza delivery driver is $2. Although the common gratuity is 15%, if it is less than $2 than the minimum should be $2. It also states that a great service person should receive 20% while a poor service person should receive only 10%.
From personal experience, many things determine the amount of gratuity a person is going to receive. The friendliness of the person, the amount of time the person takes to do the service asked, the amount of the bill itself, and the sometimes the quality of the food or items bought. Yes, I always try to pay 15%, but sometimes people do not deserve it. Because I know how it feels to do someone a service and receive a quarter, I know how a person should act to receive a good tip. From personal experience, some of the servers I have had do not deserve the 15% gratuity they want. But on the other hand, I understand that most people who get tipped don't make much money in the first place and need the tips. But I still believe that if they want more money, they need to do more work to get it.