After signing Britain up to the controversial [Lisbon Treaty, Gordon Brown] said he had persuaded EU leaders there should be no more "institutional change" for at least another decade.September 2011 (my emphasis):
On Tuesday, German finance minister Wolfgang Schaeuble called for the second time in a week for changes to the treaties.
“Strengthening the eurozone's architecture ... may need profound treaty changes,” he wrote in an opinion piece for the Financial Times.
According to populist daily Bild, the finance minister made the argument for a major shift in fiscal policy-making powers to Brussels, a move that would almost certainly necessitate a fresh opening of the treaties holding the bloc together.
This must be done, he said, “even though we know how difficult a treaty change will be.”