There is a big difference between SPG marrying AMDK and Sinkies marrying Vietbu.
The SPG married up and the Sinkie man married down. The SPG who married up thinks Sinkie men are NOT good enough for her, and this is reason she attracts the label SPG and the snide remarks that follow. The Sinkie man who married down does NOT think that Sinkie women are not good enough for her, and this does not cause resentment among Sinkie women.
So one is being snobbish whilst the other is merely looking for an affordable pussy. The internal makeup is different. She despises her own kind, but the other one feels he is being despised by his own kind.
Anyway, she will join Sharon Au soon. Every pussy has an expiry date. The high SES AMDK will not stick to an old pussy. The low SES Sinkie man who married a young Vietbu will always find the Viet pussy young because of the age gap.