First, we were never planning on saving any certain amount but I believed in maximizing our position in equities for the long term and paying taxes from a high bracket was always an unpleasant thought given the importance of compounding with a multi-decade time horizon. My annual maximum 401-K contribution to SPY and equivalents has turned out pretty well in spite of two painful hits along the way. Add to that other after tax contributions into equities and the result was what we have today. CPA looked at my career earning power and long term prospects of savings and investment in equities and always advised against Roth and I trusted him for this.
Regarding why I'm still working is two-fold. First, I studied and worked to attain maximum earning power and I'm in a field where my qualifications, skills and productivity is in very high demand. I achieved critical mass about 10 years ago (give or take a few depending on the market) so at that point I was working voluntarily, not to pay bills or fund lifestyle. The field has become quite a lucrative niche, I'm publicly respected in the field and I'm obviously not working for the money. So, I guess you can say I'm working out of habit and ego and the desire to continue to contribute. I also have a supportive wife who prefers me out of the house, too, LOL. There are plenty of very wealthy people in technology who are like me, working because we enjoy the challenge and mental stimulation and to be blunt, we probably would not do so well in retirement as we all know horror stories of colleagues who retired to the couch and watch too much Netflix (or other activities that contribute to a lack of brain stimulation).
Yup. You're wrong. It's not a scam. But it's also not designed to provide tax benefits to someone with $14m + in assets so you're right that Roth conversions don't work in your rare circumstances.
No disrespect intended but why in the world are you still working?
In my/our case I realized that the amount of taxable income to our graves is always going to be high and it is a wonderful problem to have. I used to hear those ads saying the theory that you will be in a lower tax bracket when you retire and withdraw so deferring the taxes is a good thing from that perspective. To my horror our CPA told us due to the structure of our portfolio we will probably always be in a very high bracket and trust me, we are very happy and thankful that we have this problem, but there is principle involved and while I don't like paying a lot of taxes, for us at least, the alternative would mean less assets, less financial security and less flexibility which is not a good trade-off.
Circling back, I sort of planned on having quite a bit for retirement, I just wasn't sure as death, divorce, health issues, loss of earning power, etc. can happen so uncertainty was always part of the calculus. At one time I had so much term life insurance (2M) that I was worth much more dead than alive, at least from my wife's perspective. Roth just never looked attractive, even when I didn't have much and my plan to get to critical mass (FI) was going to be slowed down moving funds to a Roth, in my opinion.
Principally, Roth conversions provide an opportunity for tax-rate arbitrage across time. If you will always be in the top rate, it is true that little or no benefit could be expected.
But you evidently have a misconception regarding the "huge penalty in losing the compounding that the government now subsidizes through tax deferment." The
commutative law of multiplication assures us that it makes no difference if you realize gains first, then pay taxes, or pay taxes first, then enjoy gains.