You suggested something to this effect before but I don't see the comparison you are making. The Labour Party grew out of the union movement. Its purpose was and is to achieve better conditions for working people. No secret has ever been made of this association. There is nothing nefarious about it.
Contrast that to the Exclusive Brethren (and undoubted others) providing secret support to Don Brash and who knows who else? I don't see the equivalence at all.

