Diffusion of RE... WHo HAS THe letters?

​When something goes wrong, who's to blame?
It's not me, I'm not the same.
There were others, many more,
Who could have stopped it at the door.

I was just a cog in the machine,
Not the one who caused a scene.
Someone else had made the call,
I just followed, that was all.

It's not my fault, I did my part,
I played the game with all my heart.
But when it all fell apart,
I knew it wasn't just my start.

So don't blame me, don't point the finger,
It's not my fault, I'm just a singer.
I'll sing my song and carry on,
And leave the blame where it belongs.