What happened to credible attribution?

When I was in journalism school they taught us that a journalist's quotes have to be attributed to credible and if possible authoritative persons with full disclosure, including age, to be noted in the story except in extremely sensitive (criminal) situations.

Today I read a Channel NewsAsia story online with quotes that went like:

"I think its okay to work till 65 because in other countries they also work till older age," said one boy.

"If you don't work, you lose your communication. You lose networking and then you become lonely, then enter the ground very fast," said one elderly Singaporean.

Then further down in the story was:
"That will give people more money to spend during the retirement years," said one Singaporean.
... one boy ... one elderly Singaporean ... one Singaporean?? Who are these people? The story itself was fine, but what happened to credible attribution?