Besides being ideological against such things as affirmative action, I'm afraid, that the explicit use and definition (what the hell is a coloured person, am I coloured, too, after sunburn?, maybe without a commitee saying who gets the benefits and who not, people wouldn't know anymore who to discriminate) of special treatment gives afterwards justification for social behaviour disfavouring those the lawmakers wanted to help in the first place.
having observed the complex and arcane genetic requirements to be classified 'hawaiian', (6 generations born and raised), i think i know what Martin meant.
it was phrased a bit funny... ~"When an inner situation is not made conscious, it appears outside as fate." Karl Jung~