Is that truly a bad idea?

Having to pass a test to demonstrate you understand the policy choices and how they affect you could be a good idea if done impartially.

Well, yes, it does have some merit but "done impartially" is the hair in the ointment, isn't it.

But to the point, categorical denial of access to a participatory space -- here based on your bank balance -- is akin to denying voting rights based on gender or color.