You get what you pay for.
The fact is (particularly in Australian culture) that everyone wants a bargain. They don't just want a competitive price for a product or service, they want the kick-ass, mother of all bargains. (This is probably to compensate for some other inadequacy in their life)The problem is that someone always pays for bargains. Normally it is the staff providing the service that have their conditions clipped but quite often the customer also discovers that their bargain is not quite what they thought it would be.
Someone always pays for a 'bargain'.
LH