PR

I was reading an article in 'Star' that application of a PR (permanent Residence) in Malaysia is not as easy as in other countries, and I totally agree with it.
Just take a case: my former landlady in Penang who married to a Penangite, they have a son who is already about 10/12 years old but till now she is still trying to apply for PR. At first, an officer told her that she should wait for five years in order to get it.
Thereafter, after that five years, another officer told her to wait for another two years and she cannot go back.

On the other hand, a 'hearsay' from a taxi driver that his friend got the PR after five years and could go back during that years. Further some people just said that a foreigner who married to a Malaysian could get/ have a job here without applying for the working permit. By contrast to what this article wrote that even a foreigner married to a Malaysian , one still need working permit as what happened to this lady named Kimberley Ann Gagnon " other employers are reluctant to employ me when they found that I do not have a PR because they do not want to pay for rm 5000 work permit and an expatriate salary".

It seems that the law in this field is blurred and not fixed , why? what are the criteria that they look into in order to apply for a PR?

There is also a case where a couple (foreigners) who can work here and get PR within a year.

"the Government will revoke the PR status of those who are involved in crime and terrorism". "the government looks at all angles and that includes security reasons. The granting of Pr is a privilege and not a right".

It seems that constitutional law is related in it under the topic of Parliamentary Privilege, I think. If 'the granting of a PR is privilege', then how can we know what are the criteriation and can it be said that some disadvantages of privilege occur or can it lead to abuse? for example , some of them might be biased/ racists.