Bro, take it easy. All countries including developed countries for national security reasons keep an eye on political parties to detect foreign interference, funding and manipulation.
If you are looking to find the funding source, they also operate like all developed countries. They all within the law but hidden from normal scrutiny but have a special governance and oversight. ISD's entire budget is hidden within MHA main accounts. SID is within MID while MSD is within SAF accounts. The entity that has clear and structured funds for running informants is actually CNB. CNB provides informants with one third of the street value of drug hauls and they make it known to the underworld. That is why they get tip-offs. The money is given in cash.
The PAP actually prefers to use the courts to intimidate its political opponents. They are also shamelessly gerrymander, alter the rules etc. They also reduce potential candidates for the opposition by monopolising talent.
The Malaysian Special Branch has twice funded candidates for Singapore GE. One of whom under the PAP banner.
What you have to worry about is CBs sitting in CEC giving away the tactical plans for the GE. The ISD's political masters on the pretext of reading reports also take away on any plans that might appear in the report. As part of national security, a every political identity has a dossier that will be built including his associates, sexual habits, traits, eccentricities etc.
It should be noted that the ISD's failure to pick up Hank Hendrickson approach to Francis Seow and other lawyers is considered a major Dept failure. They only found out by fluke when one of the detainees during the later part of Op Spectrum spill the beans.
It should also be noted that SDP is a known honeypot for the Intelligence agencies. No different to mousetraps set up at traffickers home where every addict turning up is picked up.