The best way to get out of this crisis,would be Greeks trading money or at least giving away part of their income to help others or for various services.
Instead you end up with a population that is broke and another segment that is gong broke,an actual system where money would change hands and be invested or go to some kind of personal charity.....that would work.
The whole point would be to create a system,where a wider group of people could earn cash off the books.Bartering is nice but as someone pointed out,it doesn’t take care of shelter or utility bills.
One of the more useful aspects of bartering is that it free's up cash to take care of shelter, utility and other bills that cannot be bartered for.