A conspiracy isn't necessary when the incentives align such that a group of similar people have reason to work toward such a goal independently. And because the problem is those incentives, not the individuals involved, even if you were to somehow change the mind of, imprison, or assassinate everyone pushing for these things today, more would spring up soon after.
The only way to stop this from happening is to remove the power base that those entities use to make these pushes, and remove the mechanisms that allow them to do so legally. Make it impossible to amass that much wealth. Make the worst kinds of lobbying illegal. Ruthlessly enforce antitrust laws, preventing hyperconsolidation like we see today. Make the very idea of a multibillionaire impossible.