That perfectly illustrates that there is no advantage to the Philippine state in playing along with US. There is presumably ( monetary ) advantage for Philippine politicians to do so.
That is your opinion delft...particularly the part about the corruption and under the table monetary pay-offs.
Please don't make such accusations without any evidence whatsoever of it being the case. That would be like someone saying that the President of Pakistan is on the take from China...without a shred of evidence confirming the same.
The fact is, the US has close relations with the Philippines. There are all kinds of reasons for the Philippines to want to remain close.
Sure, the Philippines do not have the resource to do what, say, Vietnam is doing in terms of bolstering their own position in the SCS...but they do hope the US will be of some help, and the US is transferring equipment to the Philippines which is better than what the Philippines would otherwise have.
Anyhow...let's not get into such discussion regarding unfounded accusations on SD.