Melina Mara/The Washington Post (Melina Mara/The Washington Post)

Finally, an explanation for the job-hopping that Treasury Secretary Jack Lew has done in the Obama administration.

During an appearance this morning at the Economic Club of Washington, Lew revealed the reason that he’s held three different posts (budget director, White House chief of staff and his current perch at Treasury) in the  past five years.

“Why have you had a hard time holding a job in this administration?” club president David Rubenstein jokingly asked Lew. “Does the president not like you?”

“My wife has teased me that if I could keep one job for longer, we could reduce unemployment in this country,” he parried. “I haven’t developed the ability to say ‘no’ when they ask me to serve.”