This comic strip comes from Frank & Ernest. It appeared on July 9, 2014.
Frank and Ernest, July 9, 2014
Barefooters are used to folks with bogus liability fears. They forget the real liability issues associated with shoes (and not just glass slippers).
Ahcuah 
Of course there wouldn’t be a problem if translators could spell. The French original had vair (leather, like your occasionally useful moccasins) instead of verre (glass). In her poverty status, Cinderella habitually went barefoot, as did most who worked for a living.
Leading on from that – shoes became aspirational objects because only the rich could afford them, which is why they symbolise assent to power, status, and wealth in the story. In other words, shoes didn’t spread because people actually needed them.