In 1986, the Presidential Commission on Good Government (PCGG) cited him for having served as a "front man" for various "ill-gotten" wealth, including $52.5 million of real estate representing the most prominent Marcos Mansions.
[3] Soon after the end of World War II in 1945, Yao Campos partnered with Mariano K. Tan to build a drugstore on Sto.
[3] (Some sources also mention an American soldier named Robert Horowitz as Yao Campos' partner in charge of production when the drugstore was first built.
[8] His campaign benefactor Yao Campos’ company Unilab was granted exclusive import licenses in the pharmaceuticals industry.
[6] Because Unilab's market dominance turned it into a major supplier of pharmaceuticals for government health programs, Yao Campos found another way to help build up Ferdinand Marcos during campaigns: by supplying the government with medicine packs branded "Medical Assistance to Rural Communities and Other Sectors" – the acronym for which spelled out "M.A.R.C.O.S.
[10] The most widely publicized of these properties include the most prominent Marcos mansions—over P2.5 billion ($52.5 million) worth in real estate located in Metro Manila, Rizal, Laguna, Cavite, Bataan, and Baguio.
[10] Yao Campos was in Canada in 1986 [11] when Corazon Aquino's revolutionary government took over the Philippines after the Marcoses were deposed by the EDSA revolution.
[10] The 1986 settlement involved PHP250 million in cash and PHP2.5 billion worth of titles to 197 properties in Metro Manila, Rizal, Laguna, Cavite, Bataan, and Baguio—all of which Yao Campos admitted were under his name but actually part of the ill-gotten wealth of Ferdinand Marcos.
[15] His sons have also become dominant forces in their own industries, making the family one of the Philippines’ most powerful business clans.
[15] Another son, Jeffrey D. Yao Campos, runs the real estate holdings company Greenfield Development Corporation.