We are not far away from that with the new regime, but ultimately that's mostly disproportionately onerous on small, risk taking entrepreneurs and small businesses.

For those people they would clearly stop drawing dividends as there would be no tax advantage to doing so. I'm not sure how you could say it is onerous (other than the fact they may have to pay more tax than they would have).

For right or wrong, the British tax code has long recognized that those putting their own capital at risk do not necessarily have the same safety nets of typical employees and taxes their rewards at a lower rate. This is why both dividend taxes and capital gains taxes are lower than income taxes, and also why Entrepreneur Relief exists.