There is this existing (and somewhat complex) system that measures people's income and diverts a portion of that to a fund which is then used to support systems

There is this existing (and somewhat complex) system that measures people's income and diverts a portion of that to a fund which is then used to support systems that people deem to be socially beneficial. Various versions of it are installed around the world. A lot of big companies that should contribute the most seem to find a way not to contribute at all, and others use their influence to divert the spending away from socially beneficial programmes. And there's quite a lot of disagreement about it, generally.