I know I'll get downvoted for exposing my point of view, but I'm one of the many people who do not tip the delivery man, so I really hope that they obtain better wages from their employers.
Society might be better if tipping were not baked into the system, but there it is: wage scales, labor and tax codes have completed normalization of tipping, at least in the US.
Your principled act of rebellion will produce not reform of commercial culture, but only distress for those who serve you -- and for yourself.
I know I'll get downvoted for exposing my point of view, but I'm one of the many people who do not tip the delivery man, so I really hope that they obtain better wages from their employers.