Why don't we tip IT service people?

You tip the pizza man, you don't tip the Fed Ex driver. You tip the bartender at the pub, and you don't tip the McDonald's clerk; but you do tip the barrista at Starbuck's. The US has ritualistic levels of tip etiquette, which admittedly don't exist other places in the world but, the question remains; Why don't we tip our IT service people?

You know just as well as we do, you couldn't function without your computer. You'd find yourself on the floor in a fetal position, crying and sulking if your PC were to decide to go AWOL at any particular moment. And, much like a herion user out for another fix, you'd wipe your tears and head to the nearest coffee shop with pay access machines to obsessively check your email. We understand, we'd do much the same thing ourselves. If your computer is that important to the fluid function of your day-to-day life, why wouldn't you slip the IT guy a little extra to make sure you get top priority next time you pick up the phone and scream Mayday?

You do not tip the IT guys because you know they get good pay already from their employers and so you think tipping is unnecessary thing for you to do. You also do tip other service people such as plumbers, electricians, nurses for the same reason.

I don't tip IT service people because you get robbed by them at every turn, be it by the price you pay to actually phone them or by the jacked-up prices they charge for parts.
They don't deserve fuck all extra.