By following this analogy, what would stop us (in IT) from requesting tips when we are not happy with our salary? This tipping madness should stop and is IMHO

By following this analogy, what would stop us (in IT) from requesting tips when we are not happy with our salary? This tipping madness should stop and is IMHO US specific - I don't see that the rest of the world sees tipping as something "by default", and in many countries tipping is even disrespectful.