If we still lived under monarchy, I'd agree 100%, but we don't.

There's at least a theoretical chance of voting the government out in favour of someone marginally better. I don't know what are the odds of that happening, but it's definitely bigger than 0%. And if we're not in the board of directors of a company, our odds of making them less corrupt is precisely 0%.

Also post world war 2, the Japanese govts did pull it off by taking control of industry and getting everyone to row in a particular direction.

The government as a monolith, probably? The government in specific departments, maybe?

Corporate combinations are profit machines.

Governments are bureaucracy and vote-getting machines.

Pick your monomaniacalism.

But! Bureaucracy does have the benefit of being defined by law. Which... big tech really doesn't.