That whole 'money-less' gifting thing makes for a very nice party. It has nothing to do with real economics. The vast majority of people at burns are able bodied, have above average practical skills and are right in the age group where you'd expect folks to be competent to work.
Gifting drinks, cordoning roads, making sure port-o-potties are functional and clean, making a silly art piece and shirtcocking among a few thousand people for a week or so has little to do with maintaining infrastructure, education, healthcare and the logistics to keep billions of people, including children, the disabled and the elderly, fed and housed all the time.
I think we can still buy ice, but I don't think we can buy coffee anymore. Coffee was a fun excuse to go to center camp every afternoon.