I'll put that on the backlog - a cowardly excuse to say you’re not going to do it, but you

a cowardly excuse to say you’re not going to do it, but you still sound like a leader

I'll put that on the backlog. (I’m a leader, not a doer.)

That’s going on the backlog. (I’m strategic, not stupid.)

I'll put that on the backlog. (I’m a hero, not a fool.)