"A recent analysis of a Federal Reserve report found that over the last three decades, the wealthiest 1 percent of Americans saw their net worth grow by $21 trillion, while the wealth of the bottom 50 percent fell by $900 billion.A letter published Monday on the website Medium.com calls for “a moderate wealth tax on the fortunes of the richest one-tenth of the richest 1 percent of Americans — on us.”The letter came together in the last two weeks. Eighteen individuals, spread among 11 families, added their names. All are active in progressive research and political organizations, some of which are pointedly focused on the swelling gap between the richest Americans and everyone else."