The old-fashioned way to level this accusation is to say that the union is "Procrustean", named after the mythical Greek King who would chop people's limbs off or stretch them on a rack so as to fit the exact dimensions of his bed.

    For THERSITES & Co., for the weakly and small,
    Who in free competition must go to the wall,
    The plan of PROCRUSTES has obvious charms:
    "Cut 'em down to our standard, chop legs, shorten arms!
    Bring us all to one level in power and pay,
    By the rule of a legalised Eight Hours Day!"