Who doesn't support these nice goals?
The reason there's no tax plan is congressional Republicans are hopelessly divided on it.
Right-wing Republicans (the "Freedom Caucus" along with what's left of the Tea Party) are most interested in reducing the size of the government and shrinking the federal deficit and debt.
Corporate and Wall Street Republicans – along with Donald Trump – are most interested in cutting taxes on corporations and the wealthy. They have the backing the GOP's big business donors who stand to make a bundle off tax cuts.
Here's the problem. You can't have a giant tax cut for corporations and the wealthy, and at the same time shrink the federal deficit and debt – unless you make gigantic cuts in government spending on things the American public wants and needs.