[kd0amg]

That wouldn't really do anything for the issue GP raises. If society sees someone sitting on a pile of ill-gotten gains, donating some of it (whether openly or secretly) just means society will see someone sitting on a slightly smaller pile of ill-gotten gains. They will not consider someone who fleeced or extorted them and then gave some money back to be their benefactors. They'll only avoid that perception by not being associated with corruption, rather than not being associated with philanthropy.