Dear Readers, Hopefully you're surviving the polar vortex, although if you're a Knicks fan, the bone-chilling temperatures may not have been the worst news this week. If you're new to the Wall Street Insider newsletter, you can sign up here. There was lots of talk this week again about Representative Alexandria Ocasio-Cortez and her proposed "rich tax" on America's wealthiest. In the last few days, Senator Elizabeth Warren jumped into the fray, unveiling a wealth tax on the 75,000 richest families in America.