The point is about rising costs of living from the perspective of a normal thinking human being.
The question is why are prices going up so quickly year on year? Not is $7 justified? If business costs like rentals, utilities and GST go up, Sinkies will tell me $10 is justified. But the point is: it has hurt my pocket by $3.
We have seen before our eyes foodcourts that employ many foreigners have not been able to bring down prices. We have seen how operators which are very aggressive in bidding for foodcourts factoring in the larger population and demand have to raise prices rapidly.
Therefore, warpconomics like without foreigners, food prices will go up should be sent to the trash bin.
Their huge presence has led to higher costs of housing and living, competition for healthcare/transport/water and depressed wages.
So please do yourself a favour, not do yourself in by talking cock.