"As far as people who come here and go back home, well they...

"As far as people who come here and go back home, well they aren't immirgrants, they are basically guest workers."

I don't see anything wrong in Australian permanent residents returning to their home country for a period of time. With the current 5 Year PR Visa, that person has to return to Australia within 5 years, if not he/she will lose the reentry right and will need to apply for what is called RRV (Resident Return Visa).