I don't know if they factored in what happens with the government revenue, but if I were on the government side.... I always look at things and ask what happens if you don't do it. If you don't do it, you're going to lose out on those incremental taxes that are going to come in. Sometimes by lowering tax, your tax revenue goes up. Sometimes you see taxes go up and revenue actually goes down.
On October 1st, 2018. See this statement in context.