Kammala jumla mai zuwa: An zabi Mathew zuwa Majalisar Wakilai ta Ceylon a babban zaben Maris na 1960 daga Kolonna daga Jam'iyyar United National Party kuma an sake zabarsa a babban zaben Yuli na 1960. Ya yi takara a babban zaben 1965 daga Bandarawela kuma R. M. Appuhamy ya ci shi. An zabe shi a zaben 'yan majalisar dokoki na 8, wanda aka gudanar a ranar 21 ga Yuli 1977, wanda ke wakiltar masu zaben Kelaniya na Jam'iyyar United National Party. An san shi da matsayin sa na tsauraran matakai game da burin siyasar Tamil. An nada shi Ministan Masana'antu da Harkokin Kimiyya a watan Yulin 1977. Ana daukarsa a matsayin daya daga cikin manyan ministocin da ke da alhakin kaddamar da shirin.
anti-Tamil pogrom na Yuli 1983, wanda daga baya ya haifar da barkewar yakin basasa na shekaru 26. An kori Mathew daga majalisar ministocin da kuma jam'iyyar United National Party mai mulki ta Shugaba J. R. Jayewardene a 1984 bayan da ya soki taron da Jayewardene ya kira don magance matsalolin 'yan tsiraru na Tamil. Magajin Jayewardene, Ranasinghe Premadasa, daga baya ya dawo da Mathew a matsayin memba na jam'iyyar. Ya mutu ne sakamakon bugun zuciya a ranar 17 ga Oktoba 1989.