Brainstorming an idea here, but what about a modification to the corporate tax rate based on something like the Gini coefficient of the compensation inequality of the workers. Want to add an extra $10M of compensation for your CEO for adding a one-quarter 2% boost? Pay an extra 0.2% in your corporate tax rate, or similar?

The other end of the spectrum is of course capital gains for shareholders, but any of the wealth taxes proposed recently would help make that more stable.

We are at French Revolution levels of inequality, with a pandemic, a president that despises the majority of US citizens but runs clubs where power-seeking wealthy people pay for admission, and we are not even building enough housing for an entire generation that's growing up. If we don't start addressing this inequality in substantial ways, we will see much greater unrest.