I don't think it's hard to extrapolate from current conditions. Corporations are currently quite powerful - they control the main lever of politics, which is money. They are already using those levers to bend governments to their will, and utilizing pet governments to produce favorable tax conditions in certain countries to reduce their contribution to others. Eventually, there will be small governments that are almost entirely puppet states of large corporations. Eventually those corporate states will grow and consolidate and you'll live in a world where corporations have as much or more power than some small legitimate countries, then some medium ones, then eventually some large ones, and finally more power than anyone else.
Corporations like amazon and google might not be self-perpetuating due to the entropy concentration inherent in companies that get that large but imagine if you had a organization of that size controlled by an AI officer team. It'll happen, just a matter of how long it takes.
So I listed all the things a powerful government can do - control the media to enhance their worldview and threaten to take away private party, arrest and kill innocent people with immunity, take away freedom over petty crimes, etc.
And I should be more worried about corporations evading taxes?
I can tell you I’m much less worried about walking into any of the Big Tech companies and being treated unfairly than I am driving down the street and being harassed by instruments of the government.
As far as using AI to discriminate. Law enforcement and the government has been discriminating for hundreds of years. They don’t need AI to decide to harass me.
Corporations like amazon and google might not be self-perpetuating due to the entropy concentration inherent in companies that get that large but imagine if you had a organization of that size controlled by an AI officer team. It'll happen, just a matter of how long it takes.