This is step one of a process of about 75 steps. This is the easiest of those steps.
Getting a bunch of countries whose tax base is being undermined by a few tax haven countries to agree on this is the easy part.
How do you get Ireland to raise their tax rate though?
How do you agree on what is taxable income? Every country has their favored industry that gets a lot of tax breaks. In this country it’s the oil, gas and coal industries, for example that we have decided are more equal than the others, but every country has their special favorites.
Congress has to write actual legislation and pass it, and all the other countries have to do the same. Congress you may have noticed can’t do anything.
I’m sure they’ll figure it out. Most likely with Uncle Sugar and the EU subsidizing the rest of the world.