Revolutionary taxes

The following is an announcement from the U.S. Embassy in Seoul to all American citizens registered with them. I am still on this mailing list because, frankly, I like being in the know about coups, plots, and terrorist activities throughout the world. These messages also tended have the undesired effect of reducing me to a curled ball in my apartment in tears for days. That is slight exaggeration for the sake of effect, but not by much. However, reading the most current edition regarding terrorist activities, I was struck by an imprecise adjective in the wording. By no means am I blaming the writers for the State Department because it is a direct quote, but it got me thinking nonetheless. I recreate it for you here.

“U.S. citizens contemplating travel to the Philippines should carefully consider the risks to their safety and security while there, including those due to terrorism. While travelers may encounter such threats anywhere in the Philippines, the southern island of Mindanao and the Sulu Archipelago are of particular concern. Travelers should exercise extreme caution in both central and western Mindanao as well as in the Sulu Archipelago. Kidnap for ransom gangs operate in the Philippines. In January 2007, one such gang abducted two U.S. citizen children outside their home in Tagum City, Davao Del Norte, in Mindanao. The New People’s Army (NPA), another terrorist organization, operates in many rural areas of the Philippines, including in the northern island of Luzon. While it has not targeted Westerners in several years, the NPA could threaten U.S. citizens engaged in business or property management activities, and it often demands “revolutionary taxes.”

Are they referring to taxes that support the revolution or revolutionary as in they are progressive and do not overburden the poor? If it is the former, then that is bad. If it is the latter, then where do we sign up?