I wrote this a few years ago in response to a similar piece: The problem is that the rich have the ability to take their income in alot of different ways. Tax income more, they'll take it as dividends. Tax dividends more, they'll take it as capital gains. Tax capital gains, they won't realize their capital gains until they can offset them with realized losses or they'll just get bank loans again't their stock holding…
I don't see why it won't be catching up if it is updated to match what people are trying to do.