In a restaurant there is a significant difference in the service provided versus a delivery driver.”
Unless that delivery driver happens to be my grandson. He lives in tiny farm area and is putting himself through school. Job market is almost non-existent and so he works as many part-time jobs as he can find. Latest one was as a pizza delivery driver. The defined delivery area is within that phone exchange and is huge and quite rural. Owner pays him $2.00 per delivery and he gets to keep tips. Last week he went through two tanks of $3.89/gallon gas and earned $25.00 in tips, barely enough to pay for one tank of gas. After he and I had an economics session on the phone he quit the job. So IMO, delivery is not just about service, it is about convenience for the person who is requesting the delivery. Not all situations are equal.
It's a free market. If the hourly wages offered for this minimum amount of work is too low in your opinion, then it must not be in others’ opinions. If this was the case the owner of the business would be forced to pay more for this work or else close their doors because they couldn't keep service employees hired.
The example of the pizza delivery wages not even covering the cost of gasoline is a good example. I'm sure anyone hired into that position will figure that out soon enough and eventually the owner will have to either pay more or discontinue delivery service. Since delivery is probably an essential element to his business that would likely mean paying more and probably charging a delivery fee or raising prices.