Forget something as simple as a tax hike. There’s a growing movement not only to raise but also to fix tax rates on a global scale.

The G-20 is pursuing a so-called “global minimum tax,” which would establish a specific taxing level in the world’s largest economies. While the proposal is thus far limited to the tax rate imposed on company profits, this is very likely just the opening salvo in pushing for global minimum tax rates of all kinds.