With a government backed welfare savings currency the 3rd sector could grow with economic growth better at less cost to the government but still steady growth and low volatility. Like a special economic bubble in sink with development for welfare of nature and people issues.
The other thing is people could have a special Ethical prepayment card and mitigate better a community against poor ecology and ethics of products along with boosting the 3rd sector as a whole and each person, organisation or company could set how their extra cash flows into efforts meaning many more 100's of millions could play a vital democratic and progressive role in the ethics and ecology solutions for the world.
All this could be managed in a personal world welfare diary where you can see exactly how much good your efforts are worth.
Give people more opportunity to improve the world and many will surprise you especially when they can judge up their impact well and optimise their efforts to suit their life style.