Where they do benefit is when you, say, lower every bracket by 2%. But that is fundamentally different from your proposition.
https://www.washingtonpost.com/business/2019/10/08/first-tim...
Let's say that you've got a nice little setup for yourself. $1.5M/yr in personal income, with another US$8M or so flowing into things you indirectly (in time or space) will benefit from.
Now let's bump up the top marginal rate to 95% on amounts over $1M. You're personal income is reduced by an amount on the order of $400-500k per year. You're not likely to just accept that, and live on less. Instead, you're going to rearrange things so that you're back to the same "take home" personal income, while the "diversions that benefit you" drop a corresponding amount.