I do agree with you, but I think it's worth nitpicking the examples. Is the Disney case an inequality problem? I'm not sure that it is. Suppose we waved a magic wand, and suddenly all of Disney's employees and shareholders were middle class people. Would that change Disney Inc's incentives around IP lobbying?
I think that rather than an inequality problem, cases like Disney are something like a "concentrated interests" problem. Even if every individual person had exactly the same amount of money in the bank, they wouldn't all be equally invested in the exact same things, and competing interests would still emerge. Disney's incentives follow just from the fact that it has shareholders, regardless of how much wealth those shareholders have. And for what it's worth, as a society, this is definitely the problem we want! Concentrated interests solve huge problems, like how to make a $100 million movie that everyone wants to see, but that no one person could fund on their own.