There is a very strong incentive when you make that kind of money to not let anybody know that you make that kind of money. There's zero upside and lots of downsides - jealousy, people asking for money, awkward conversations, competition in your niche skillset, etc.
I feel you. It seems like the very high paid tech workers prefer to be incognito. This makes sense since they must have an essential and scarce skill set to bring in that kind of money.