http://www.newsweek.com/elon-musk-wealth-bernie-sanders-tweet-spacex-1577694 > Bernie Sanders has told Elon Musk humanity should focus on problems on Earth rather than spend resources on advancing space travel. > On Twitter, the U.S. Senator from Vermont pointed to an "obscene" level of wealth inequality in the country and said the tax system should be overhauled in order to give people more access to food and health care.