Walmart’s not going to be a good model, there, as while the chance of abuse being the cause might not be 100%, it hangs out near enough 100 to know more than a few intimate things about it.
If you’re asking someone to collect your groceries, maybe pay them to do so. Tips are broken as a concept, so whatever there.
As someone who hates talking on the phone, I do not mind a bit that we’re moving away from voice communications