Exactly what the coast guard is doing right now, of course. Exercising restraint and using the least violent means to achieve the goal. As I said, there is no need for aggressive action, no need to humiliate them, no need for anything except patient pressure to wear them down and exhaust their resolve. The Philippines are trying to play the PR game, and the answer to that is slow and gradual moves instead of big dramatic ones. The 1st water cannon headline is shocking, the 100th one is routine. People like you want to rush in and give them more headlines just because you're upset they aren't folding over right away. And that's pure ego talking. Of course there will be people who oppose you, that's life. Winning is never free. Get used to it.
Because CCG is part of PAP, and they are the ones putting on the pressure here. If you don't like how they do it, then go ahead and change it.