The largest corporation (not government-owned) in existence today is a microscopically small fragment of the size of the corporate behemoths of 100 years ago, and the corporations of one hundred years ago were microscopically minuscule compared to the largest corporations of 400 years ago.

Not only that, but the ancient proto-corporations were not partners with government, they were governments.

For about 20 years, the Mississippi Company was worth between $5-7 trillion, adjusted for inflation. That's about 6 Microsofts, and at the time of the Mississippi Company there were many chartered trading companies that ruled over their dominions with iron fists. Microsoft doesn't have a private army.

How did puny little Microsoft/Google/Apple/BP/GE/Chase/whoever/whatever "end" the class war when Standard Oil did not?