One of the perks of being head of the U.S Treasury department is that the Treasury Secretary’s signature appears on all currency. That’s not something to brag about when the signature is illegible. Timothy Geithner had that problem, so he changed his signature so people could read it. Newly nominated Jack Lew is to replace Geithner, and we can only hope that he changes his signature too. It is not just illegible. It is cartoonish, with loops that looks more like a row of poorly arranged zeros. This time, the Republicans who automatically oppose whatever Obama does have a reason to halt Lew’s nomination — at least until he clarifies that he won’t be doodling on dollar bills.