Sounds like anti-capitalist hippies. Well I'm not really the type to self-sacrifice for my ideals that much anyways.
But that's not really what Ginko is. He's not self-sufficient, he certainly requires money and trade of goods and services in general. In a way, he's exploiting the Mushi, even if it's for justified and fair reasons.
In a society dictated by "freeganism" it sounds like they wouldn't even go against the mushi, they'd just let people die instead.