Governments are not friendly.
They have seized billion dollar factories for their own use.
I only imagine a trivial tax problem would give a corrupt government the opportunity to seize assets.
I hate Uber but I don't think this is something to really fault them on.
Maybe Uber's hiding stuff? Yeah, maybe they are. But when the government comes in and grabs all your shit, they get the upper hand while it's all sorted out. Violated the 4th Amendment? Yeah, that's too bad, we're really sorry about that, we promise to unsift what we've already sifted through. It's easier if the stuff is just locked down to begin with, then after the raid we can make sure our warrants are in order, you actually have the right company, and you're just generally allowed to do this, then we can unlock the machines with smiles on our faces.
The government is not Uber's competition, and actually has interest in them existing as they can collect taxes from them. It's not appropriate to view it through an "adversarial" lens.
Neither are corporations. Uber is not your friend.