How does this fix the fast food problem? 1) Who will clean the machines well every night? 2) Really? Try to answer 1 honestly. 3) How will keep the tables clean, as well as the messes from terrible idiot customers who no longer believe they should clean up a mess they make (at least partially until getting help from employee)? 4) When I mean clean, I don't mean rubbing the table with microquat (or equivalent) and knocking the food and crumbs all over the seating surface. I mean cleaning it so that you would comfortably (and by you I mean more than 50 % of the people) lick the surface of the table. It takes hot soapy water, effort, and technique - all things that seem to be missing from restaurants (fast and many not-so-fast). 5) Terrible mopping, etc.

The big problem isn't keeping cheap sh*tty food cheap, it's keeping the restaurants clean enough you don't feel dirty when you leave. That is a social and managerial problem, and you don't fix it with magical meat grinder machine.