Any efficiencies you are seeing will be refactored and stretched out as any business cannot afford to carry fat if they want maximum profit and competitive edge (price).
This whole inconvenience of a friend going to the bathroom is an incredibly weak argument for foregoing the tradition and ceremony of interacting with a person who will provide you with a meal. If you want to live in a McWorld where every step of your dining experience is as sterile, efficient, and touch free as possible then I am sad for you. That's not what a meal with friends and family means to me, it's not just about eating for sustenance.
Why do you draw the line at taking payment?
This is a lot to unpack. I'm always surprised by people in the tech industry, where we seek to automate so much to make things better... be against innovation?
If a QR menu can tangibly provide a similar or better experience, for less cost, then it is objectively a better value for everyone involved. We shouldn't keep manual jobs around "just because." If that was a valid mindset, then we should get rid of all cars and have large caravans of people to trade across the country to ensure more people have jobs.
In this case, the question becomes "does the QR code provide a similar, or better, experience?" Only time will tell - but if it does, overall, then it will replace the wait staff, and this is a good thing.
This is why discussions of UBI take place, because we shouldn't intentionally do things less efficiently just to save jobs.
> The reason these wait staff get tips is because they work so hard, with less service comes less tips. Now you have a whole industry of overworked AND underpaid staff.
I don't disagree here, but tip culture is an absurd concept and I wish it would die in America. Just bake it into the price of the menu, and pay workers better.