There are many high earners on HN, and presumably the OP would not blindly follow any advice given but use it as a starting point for doing his own research. I

There are many high earners on HN, and presumably the OP would not blindly follow any advice given but use it as a starting point for doing his own research. If some W2 income can be converted to self-employment income, more money can be socked away pre-tax into a SEP-IRA. My wife, a doctor, gets some self-employment income from moonlighting. Some finance executives get compensation as "carried interest" taxed as capital gains.