I believe that this dates back to the time of the Spaniards. Filipinos (er, Indios) were considered second class islanders or even lower. Even Mestizos (in the 60s these were know as the "mestizo de entre suelo) born in the island belonged to a lower strata when compared to a Spanish migrant. However, the process of social assimilation by the Filipino with the Mestizos and Spaniards had a pre-requisite of land and wealth. This was very evident in Rizal's novels, particularly, with Dona Victorina. Up to this day, wealth and influence became the standard of the Filipinos' acceptance in the society or community he/she revolves in, not just abroad but even locally.
The situation never improved because the Philippines never had the occasion to broaden its middle class. The landed and the hacenderos wielded power and influence during the post-Spanish rule. It got worse during Marcos' time, where only a handful of cronies benefitted. To have influence and wealth, cronies stole from that state. Corruption was a way to get rich. This carried on during Cory's, FVR's, Erap's term. Well, need I say more for GMA's term?
Filipinos are proud! Among the countries in Asia, we are one race where bowing is not customary -- Japan, China, Korea, India, Thailand etc. bowing is part of their tradition. Filipinos, they nod their heads by lifting their chin.
A false pretense from one of the poorest country in Asia!