More context is needed, as "enlightened economy" is correct but has a different meaning (economy managed by educated and/or spiritual leaders/ideals). Some of Trans4u's other options could work in a specific context.

Anyway, this seems to be the most common usage:

Gift economy - Wikipedia, the free encyclopedia- A gift economy is an economic system in which goods and services are given without any explicit agreement for immediate or future quid pro quo. ...
en.wikipedia.org/wiki/Gift_economy

Digital gifts: Participation and gift exchange in LiveJournal ...- In doing so, it will argue that, unlike earlier anthropological and socio–economic notions of the gift economy that see the exchange as one of power ...
www.firstmonday.org/ISSUES/issue12_5/pearson