Earlier quoted context omitted.
I suspect that when I tip online for pizza it automatically gets bumped to the lowest priority of all of the driver's deliveries. He already has my money, and prioritizing all of the cash-tip orders over mine gives more potential for earning tips. Of course, my sample size is too small to say anything conclusive. After it felt like I was noticing a pattern a couple of times I just switched back to tipping cash.
When I've tipped online for pizza, and tip pretty well, I tend to get my pizza very quickly with a driver wanting to please me (like one time an order was messed up slightly and he immediately drove back and brought a new one without me even asking). My vague guess is that if you leave an above-average tip on an online order, the order gets immediately grabbed my a delivery person since they know they'll get at least…
Be an interesting thing to really do some research on, though.
I will say I tend to agree that I'd rather see employees be paid a higher rate by the company itself and then have their performance monitored and be rewarded or punished accordingly. I've worked in a few places that paid hourly folks $14+ an hour, in parts of the country where that was pretty decent money for a job you get get off the street, and they managed to keep really efficient employees who did their jobs well.