Advice required, I have a problem with spending money, in my pocket and it is gone faster than i can say 100 bucks.

A friend told the way he overcomes this problem is he transfers his total vat amount into a saving account every month( he doesnt have direct access to this account), and every 2 months sars takes the amount which the accountant works out to pay. The balance is left in the saving account unitl it reaches R100 000, he then transfer it into a money market account. This account is used to purchase vehicles or other expensive equipment required for his company and pays cash or eft transfer.

any suggestions?