Check out the broad effects of changing the tax system in the US that have been proposed or that will be proposed to deal with the extensive inequality that exists in the country and that is getting worse.
This simulator, available by searching for: taxjusticenow.org, was researched and created by Professors Emmanuel Saez and Gabriel Zuckman, both of the University of California Berkeley. If you find it interesting, read their book, “The Power of Injustice”, which looks at the ways the rich benefit from and manipulate the tax system increasing inequality and their proposals to deal with it.