Please note that those data refer mostly to the central or national government. I think local government units (provinces or regions, cities, villages or barangays) and government enterprises data are not included there, at least for the Philippines.
Thus, both government revenues/GDP and government spending/GDP ratio for the Philippines do not include those by LGUs and by some government corporations and financial institutions. So public contribution to PhilHealth, SSS and PagIBIG (housing) are not included in government revenues; also public payment to various local taxes and regulatory fees by LGUs. Governments almost anywhere are BIG and expansive.
Note Cambodia's public debt, only 28.5 percent of GDP, a lot lower than those in the Philippines, Thailand and Vietnam. I wish the Cambodian government will not follow the heavy fiscal irresponsibility of its two neighbors.
ASEAN 1: Asian regional bureaucracies, November 08, 2006
ASEAN 2: Regional Meetings, Indonesia's Military Businessmen, September 13, 2007
ASEAN 3: On Myanmar, Letter to Sec. Romulo, October 05, 2007
Business 360 8: TPP, RCEP, SAARC and Free Trade, June 17, 2013
EFN Asia 25: The ASEAN Economic Community in 2015, July 23, 2013