Full Idea
The Golden Rule depends on contingent facts about how people like to be treated. The categorical imperative asks that we abstract from such contingencies and respect persons as rational beings, regardless of what they might want in particular situations.
Gist of Idea
The categorical imperative is not the Golden Rule, which concerns contingent desires
Source
Michael J. Sandel (Justice: What's the right thing to do? [2009], 05)
Book Reference
Sandel,Michael J.: 'Justice: what's the right thing to do?' [Penguin 2010], p.124
A Reaction
I think the Golden Rule is wrong for a different reason. It assumes that we all want similar things, which we don't. Focus on other people's needs, not yours.