The technology is available and all it needs is to be adopted here.
(http://media.npr.org/assets/img/2013/08/28/4394115117_cc7c27384a_o-0c88136db3597beff86b4fd70894960f5b27b7a8-s6-c30.jpg)
(http://i1.ytimg.com/vi/PldaAuGVbQ8/hqdefault.jpg)
(http://media.npr.org/assets/img/2013/08/28/5756170490_f5e3853f2f_o-ec9b5806776efb88d7a962d9f28c930fbc100ad5-s6-c30.jpg)
We used to have that technology in the 30s, and even up until the 70s. It was called the Automat (http://en.wikipedia.org/wiki/Automat).
(http://i1.disneyfoodblog.com/wp-content/uploads/2011/04/automat-1.jpg)
It definitely needs to be reintroduced. Fast food was one of the forces that destroyed the old automated cafeterias; it would be the perfect irony if the new automated cafeterias destroyed fast food.