Economical Marriage

The Economist weekly magazine in it's last issue have begun a discussion about the direct relation between Marriage and improvement of living style.
It's counted some reasons which you can see here:
- When two people live with each other then the life costs will decrease out of the shared facilities they use.
- For being successful in work you need to have a good public relation ability, in other words if you don't have this ,then you won't be successful... and obviously this is a case which will help you in finding appropriate spouse.
- When two people got married then the sense of responsibility will increase in them and they will put more effort to have better life style. In fact this common life is an enthusiasm for them to work harder and earn better salaries.
- Married people save their money better than single ones and by this background they can decide bigger decisions.(This portion is 4 for married ones and 1 for singles)

I,myself, am agree with the reasons. At least it's so true for myself and my people around. What do you think? Are you agree or in the convention that marriage will waste all the saved money of the singles?!!!