Here's something that is not considered in the immigration debate. Money that leaves the local economy through transfers by immigrants to families in their country of origin. In this video, (which I admit I have not fact checked, or found the original source) it is claimed that in one year $38 billion dollars left the local economy through transfer to "the old country".
First thing I need to say that this money was, hopefully, money available after wages and salaries of the senders had been taxed under the PAYE method. So the sender had the right do do with the money anything he desired. Secondly, this money would have been sent digitally since it is illegal to take a large number of banknotes out of the country.
So what's wrong with this? Basically it means that the local economy lost the use of that amount of credit. For a start, if it had been spent here, local businesses would have benefitted from the increase in their line of trade. Increase local business and you increase demand for goods and services and create employment. Also, 10% would have gone back to Treaasury as GST.
Does this transfer of money actually occur? I had contact with Phillipino carers working after Mum when she was alive. The were sending money back 'home' to support family. There are a lot of Chinese workers in the construction industry, and what about trolley boys and Uber drivers?