The Black Keys Drummer Patrick Carney -- Justin Bieber's Rich ... He Doesn't Deserve Grammys

Justin Bieber has no business winning Grammys -- at least according to a guy who cleaned up at the award show last night ... Patrick Carney from The Black Keys.

Patrick was swarmed by fans outside Chateau Marmont when we asked if Bieber should feel snubbed -- seeing as how he didn't get a single Grammy nomination this year -- and he simply said, "He's rich, right?"

Then the Keys' drummer threw a major jab, adding ... "Grammys are for like music, not for money ... and he's making a lot of money. He should be happy."

He might have a point -- Justin's never won a Grammy, and does seem pretty happy ... with his Ferraris, Lamborghinis, and such.