You either do it or you don't.
This is the PAP's problem. While it claims that the TC system will put MPs to the test but the fact is that most of PAP TCs employed MA and now, WP also followed suit. Thus, TC system has failed one of its most important aim of measuring "abilities" of MPs, be it PAP or opposition.
Granted, even if TCs are not run by MA, one could still employ good estate managers to do the job. The variations will lie in the distribution of resources in minor improvement.
The reason against MA running TCs is of economic values. For WP's case, apparently there is no competitive edge in employing a MA like FMSS and it will definitely cost more. Thus, in the interests of residents, it should not be done so.
Goh Meng Seng