Some friends ask me to recommend somebody

At present, my friends ask me to recommend some quality members to them.

One is my forward colleague.He joined another company as a purchaser supervisor. He wants to find a supplier quality engineer for his team. I recommend him a girl who ever was my underling.I think she is very hardworking. It is important that she knows what her boss needs her to do. She can communicate well with her boss and inspectors. She can monitor the inspectors when I left for working. So I first think her when my friend asked me about candidate. But the girl just marrys and  will be pregant. So Friend doesn't accept her.

Today, another friend asks me to recommend a quality supervisor to him. As he said,he met some problems about quality. His customer might cancel his approved supplier qualification. He worried very much. He hopes that I can help him. He won't recruit somebody in Human Resource. He hope find someone can handle something really and soon.

Work several years, I find some persons can't find approprite jobs and some company can't recruit approprite employees. Why? Really is it education problems?