Just five months after Amazon moved to a $15 minimum wage, chief executive Jeff Bezos has called on other retailers to match it. “Today I challenge our top retail competitors (you know who you are!) to match our employee benefits and our $15 minimum wage,” Bezos said in a letter to shareholders filed Thursday with the U.S. Securities and Exchange Commission. “Do it! Better yet, go to $16 and throw the gauntlet back at us. It’s a kind of competition that will benefit everyone…” The Washington Post