I have gone through all the posts and I'm surprised that none of them knows the reason. You mean there are so many in this forum who don't chauffeur the wife around or do not have friends who do that ?
I will tell you the reason based on the statistics I gathered over the years. It's because the wife helps service the installment for the car, and the husband lan lan siao siao got to play Ahmad and fetch the wife at her work place to 'show' her colleagues. This is something that husband will not easily reveal (even to their buddies) because most men will find it 'lao kui' that they depend on the wife for a car.
Ask yourself. When you go buy a new car at the showroom, did you bring your wife along ? Did your wife partake in any decision making as to the type and colour of the car ? Your fate as a chauffeur starts at that very moment when your wife's opinion is sought.
I remember I once accompanied a friend to buy a new car. He is the sole breadwinner of the family and the wife is a housewife. I taught him how to bargain because the car wasn't Toyota or Honda, and we successfully reduced the price by $3,000. Then came the bomb - he didn't dare commit and told the saleslady she would bring his wife to see the car the next day. I pulled him to one side and fucked him on the spot.