Germany's ruling parties are to introduce a resolution in parliament blocking any further boost to the EU’s bail-out machinery, vastly complicating Greece’s rescue package and risking a major clash with the International Monetary Fund. “European solidarity is not an end in itself and should not be a one-way street. Germany’s engagement has reached it limits,” said the text, drafted by Chancellor Angela Merkel’s Christian Democrats and Free Democrat (FDP) allies. “Germany itself faces strict austerity to comply with the national debt brake,” said the declaration, which will go to the Bundestag next week. Lawmakers said there is no scope to...