I am not sure how this comment relates to the linked article. Are you saying, in your example, that there was $2M of luxury "purchases" to report, but they aren't really economically meaningful transactions?
It is not as simple as this. In most cases, capital gain tax is involved; however, very wealthy people usually have access to a number of tools to defer, or to completely avoid, certain taxes such as these.
In addition to taxes, the transaction most likely won't be frictionless, there are always accountants, bankers, and government registration fees to deal with, not to mention finder's fees.
One of the main ways to defer taxes for wealthy people is to borrow against appreciated assets (unrecognized income, not taxable) instead of selling the asset (recognized and taxable). The boat and car in the example are probably not owned free and clear.
Just put a slave flash in your license plate lights. When the flash of the camera goes off, the slave flash on the vehicle fires, overexposing the license plate.
So, have the license plate connected to speed meter - every time you are over speed limit the number changes, regardless of whether or not you are being filmed/photographed. :-D
I know where all my local cameras are.
And also, waze is pretty good at knowing where others are, and my speed.
"It looks like you're driving too fast, can i help you with that?"
Not really that helpfull: if there's a camera that managed to catch the incident then it will film you before you hit someone, and you can only change the license plate after. It might make police chase harder, but they still have evidence to you use against you in court. Unless you have some AI that can predict accident 10 seconds in advance, but then it could hit the breaks instead of just changing the license plate.
Most hit-and-run incidents do not currently occur within the view of a license plate-resolving camera, or in sight of a police cruiser in a position to initiate a chase. Other than in cases like these, the incident does not have to be anticipated 10 seconds in advance for the obfuscation to increase the chances of getting away with it.