When you get married, you have to be sure that you will be able to support yr family financially. Not to mention to support kids that you may have in the future, but supporting yr wife is the basic. As most singaporean ladies have higher education, they tend to prefer to work after marriage. This will lessen the burden of the husband. this will be something that most bros will deem desirable. But singaporean ladies lack most of the virtues that singapore man desires.
marrying a vietnamese lady is a different story. As most singaporean man marry vietnamese ladies of lower education standards, its hardly possible for them to work after marriage. The singaporean husband has to provide for her. Matters get more complicated as these vietnamese ladies are often tied down by family ties. Their family members in vietnam have this idea that `all foreigners are rich' and will demand a lot from their singaporean son-in-law. To complicate matters further, most bros got to know their vietnamese spouses at KTV or other entertainment venues. Before marriage, they may have an income that is many times higher than yours. So when you cannot provide for her, first idea is for her to return to her former occupation.
To each their own. But one thing is, get married only when you are financially and emotionally stable.

Marriage is not a game of sex, its a load of responsbilities