This is a good initiative. Muslims like me have to already give out a fifth (%20) of their earnings every year called Khums https://en.wikipedia.org/wiki/Khums We also believe from numerous Hadith's that the money comes back in double for those that give. As they say, you can't take with your palms closed.
* Lending with interest is forbidden (which also rules out investment in traditional bonds)
* Zakat is a mandatory annual 2.5% wealth tax
As you might imagine, the latter makes it very difficult to retire without some sort of pension system.