Not so long ago, to visit the Erez checkpoint on Gaza’s “border” crossing with Israel was to witness a modem slave market. Tens of thousands of Palestinian workers would wake up at 3 am and gather at Erez for the privilege of working in their occupier’s economy, predominantly in construction and agriculture, undertaking the “dirty work” that Jewish workers would not do, for a wage on average a third less than their Jewish peers. At least 30 percent of Gaza’s GNP derived from wages earned in Israel.