Swings both ways, how many customers offer to pay cash for a cheaper price then after the goods or services are completed pay by card. I always put a 10% loading on my invoices when asked for a cheaper price took off 5%, never failed.
I think he may be talking about the tax being avoided at the Asian fruit/bread/fish and chip/takeaway shops and restaurants along with the employees being paid in cash, I reckon in Glen Waverley and Springvale alone the ATO could recoup far more than they could delving into tradies cash transactions. (Dont know where the crap fruit came into it)
At the end of the day it just isn't worth avoiding tax on a large scale, a little bit here and there is OK but gone are the days where you could splurge the untaxed income on overseas holidays,a luxury car, caravan or boat, all those sorts of things are easily monitored with the ATO.
I miss the Howard years.