Yes it would be something to put to the WCPT. This a role the WCPT could take on. As the international body they could set up a standard setting role in education

i heard from a fellow therapist that in NZ any therapist can get license by submitting 12 thesis...
No not really. The physiotherapy board in NZ has an unusual system in that it sets out the competencies that the overseas applicant must provide evidence that they possess. The Board looks at a range of evidence including education transcripts, Post education experience, higher education written essays etc. It is actually quite exacting and many don't make it.
and the therapist who has NZ's licence is exempt from license exam of AUS.....is it like that?
NZ and Australia have a close relationship in many political and economic spheres. We have a mutual agreement that Australian registered have a fast track registration here and vice versa. The educational standard between the countries is also very similar so it is a good arrangement.