Has tipping at bars, restaurants and stores gotten out of control?

I'm not wealthy but believe in rewarding people for their hard work. It seems that almost every store includes a tipping prompt on the pinpad machines when you go to checkout/pay. I order a pizza online last weekend and was presented with the option to tip (I was pickup up the pizza and didn't tip). Its frustrating that most stores only offer 10, 15 and 20% amounts with no option not to tip (on some machines you have to navigated to "other" on tipping screen and manually input 0). I'm not against rewarding people for their hard work I'm just not going to pay them for doing their jobs.
Has tipping at bars, restaurants and stores gotten out of control?
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