Growing Number Of Rich, Comfortable But Single Men

This is a source of concern. I write for a few friends of mine - hardworking and nice guys (30+ years) working in various reputable firms in Nigeria. But 3, 4, 5 years after, they are still searching for the lady of their heart desires. I also notice the trend everywhere I go.

Just as we complain about the growing number of unmarried ladies, I'm also worried abt the growing number of unmarried, comfortable men who are over 30 years.

A case in study is a popular friend of mine who has been working in the oil sector for more than 5 years. He clocks 33 this year. He still remains unmarried. He says he is still searching. I can count more than 10 of my friends - comfortable, hale and healthy, gainfully employed but single after working for more than 5 years..What can be the cause?
Are ladies getting scarce, or is it that there are few "wife materials" in town now? or are they simply afraid of making commitment?