Think Varian, which developed military applications for the klystron, including nuclear bomb fuses.
The first semiconductor companies were considered too risky for military funding, so used risk capital.
See Steve Blank's writings on the Secret History of Silicon Valley for more, like https://steveblank.com/2009/10/29/the-secret-history-of-sili... .
In an alternate reality Mr Brin could still be a billionaire owner of a company not based in CA and he would still have to face this issue or he may not.
But we are here and question is why they don't think it is ok to pay these taxes. It is interesting to see their actions. There is some double think here - they want to cut ties and move out, yet want to influence the state. A sibling comment rightly said - they could be heroes by spending money that would be just a drop in the bucket for them, but instead choose to do this - still spend that money. The old adage seems true, you didn't become rich by doing that.
Now I understand one may not be happy the way the state allocates the funds - but that is a different discussion.
Taxes on the highest income bracket during Dwight D. Eisenhower's presidency where 90%.
90%.
Ya know, during the 1950s. The so called "Golden Years" of the USA. Fiercely anti-communist, Cold War going on.
And here we were taxing the richest at 90%.
That's how I know your comment is in bad faith.