No, by being anti-competitive. Most countries have laws against monopolies, and it was naive to expect that countries would wait until you destroy the competition to enforce those laws.
Yes. It's the reality of capitalistic end game. You start with a great product, innovate for 30 years and then when you think you got it and can endlessly extract the rent from the market, while adding another megapixel and megaherz and buying out or bulling competitors, then the government knocks on your door and gives you the award of the biggest asshat in the town and asks to retire.
Congrats, you won, now let somebody else play the game and become a boring public utility. And by the way, your research lab is now a public university. And the taxes is what government does, not you.
Because the role of the government (in theory) is to use these taxes for public utility services and projects. Companies only care about their owners and shareholders, a very small subset of the population. If you're not contributing to society, but just profiteering, you should retire. Especially if your position lead you to have a say to what succeed or not in the economy.