Mayor Bloomberg, our very own billionaire mayor, is asking state lawmakers to keep the sales tax at 8.375%. Apparently the sales tax, per "Rules dating back to the city's fiscal crisis of the 1970s" (thanks for the history lesson, NY Sun!), would have dropped 1 percentage point to 7.375% on July 1, 2008, but Bloomberg wants to keep it at its current level. That extra 1 percent tax means about $1 billion in revenue for......