This is how I understand it, we need people from the bottom percentile (workers) as much as we need people from the top (leaders) and when the gap becomes to apparent, it causes issues.
People of low income do boost GDP a lot by buying & paying for the basics: food, clothes, rent etc...
In UK, the polish migrants were contributing more than the average UK born worker... and it might be the case too in Australia and they do kep inflation down. With Brexit happening, lack of workers in farms, construction etc have pushed up the price of food and house repairs tremendously. Yes pay will rise but it is always in retrospect or a delayed reaction to inflation.
So in saying this, Australia can do more to help the average and below average workers, one is by providing cheap public housing like Singapore which has a very high poverty level, higher than Australia surprisingly.
Oxford Economics reckons that the average migrant from the rest of Europe contributed about £2,300 more to UK public finances in 2016-17 than the average UK-born adult
