Perhaps the word Liberal might rub off on the member yelling it, although I doubt it. To be Liberal is to be honourable and to care and to be open minded.
While the government has no interest in denying protection to those who need it, there is a requirement for justice to be done and for justice to be seen to be done. This means the possibility that decision makers are seen as simply doing the will of the government of the day must be avoided. That is why the creation of an independent body was seen to be so important. It reinforces both the reality and the perception of impartiality.
There is another compelling reason for having an independent body devoted to refugee determination status. This work calls for particular skills, for particular expertise. It requires a knowledge and understanding of refugee issues.