It's a well-know fact that women are often more astute at managing family finances than men.

I have many western friends in long term western marriages where this also applies. Decent western wives are far less likely to say things like 'F*ck the electricity bill, I'm off to the pub!'

In most cases, my friends just simply don't have the time or the inclination to manage the household bills - or they are so accustomed to it now that they just don't care....

As long as you know what is going on, I see nothing wrong with 'wifey' managing the money.