Why i can't work in Malaysia?

I've married to Malaysian and now stay in Malaysia. every year i have to renew my visa here, but what makes me confused on my visa it written "any form of employment is strictly prohibited. WIFE OF CITIZEN. could somebody who really understand explain to me what is mean? is this mean i cannot have a job in Malaysia? i have been work before in my country and have a diploma too. it's really hard for someone who get use to work then suddenly have to stay at home. Could somebody explain to me about this Malaysia regulation??? many thanks