Sure, but how many people are going to be able to make a living on Hamburger ebooks? I don't think it's that hard to supplement your income a bit like this but I don't see this kind of thing compensating for many lost full-time jobs.
So... How many single people earn a living, pay rent, bills, feed themselves and live to an acceptable standard from selling Hamburger ebooks?
Also don't forget that you don't have to live in a rich country for you to sell ebooks. Anywhere with internet is fine.