So I thought about it a bit, and SOC could be used similar to how Rank is used.
Like with rank, you were a Sergeant in the Army, and you're talking with an ex-Colonel. He's going to pull rank on you, you just know it, so you're going to have to appeal to something else.
Similarly, say you're middle class, and you're talking with a business factor who's also a Knight. You probably won't try to fake your way into his social graces unless you're out of options.