* Nobel laureate a long-time critic of austerity packages * Says European Union must promote growth * Stiglitz publishing book on Monday By Tiziana Barghini NEW YORK, June 10 (Reuters) - Europe's plan to lend money to Spain to heal some of its banks may not work because the government and the country's lenders will in effect be propping each other up, Nobel Prize-winning economist Joseph Stiglitz said.