Why should we tip people in the frst place just for doing their job.
I could spend hours sorting out a persons mortgage, a quite complex process in some cases and not once did I get a financia tip yet some bloke manages to drive me from a to b or someone deigns to bring me the food I ordered on a plate in a reasonable time and with a smile and I'm supposed to pay an additional amount for the product. Makes no econmic sense.
Last night I sat down with 25 sets of parents over an evening to tell them how much I taught their darling off spring and did not get one tip from them. Next time the hat with a few coins and notes as seed money is going on the desk.
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As I mature I've learned that you cannot make someone love you. All you can do is stalk them and hope they panic and give in.