also SARS does have access to all and everyones banking details if and when they so wish. please remember this when you do your e-filing online. if you enter incorrect banking details it will automatically tell you the banking details are incorrect. SARS are linked to all banks as well as the deeds and vehicle licencing offices.
Frankly you don't know what you are talking about. SARS does not have access to bank systems. Yes, i.t.o. powers allocated to them in the Income Tax Act they can request information from the banks, but that only happens when something caused a flag at SARS and you are investigated for whatever reason. The important part to understand is that such a flag will never originate from the bank e.g. by making a large deposit. There simply is no bank monitoring system in place.