Visitor Visa - B2

My brother applied for a B2 visa with family (Wife and 3 kids). His visa has been denied before and this time he applied with family. Below is their experience at New Delhi embassy on 6/30/16

Vo: Good Morning
Bro: Good Morning

Vo: Can I have your passports?
Bro: Given

Vo: What is the purpose of travel?
Bro: To visit my brother and his family

Vo: For how long your brother has been living there?
Bro: Explained

Vo: What does he do?
Bro: Explained

Vo: What do you do?
Bro: I am a laser tech at eye hospital

Vo: What is your monthly salary?
Bro: 30000

Vo: Is thisbefore tax?
Bro: Yes

Vo: Where your kids study?
Bro: xyz school

Vo: What is there annual fees?
Bro: Explained

Vo typed something
Now Vo looked at his wife and asked:

Vo: What do you do?
Wife: I am a teacher at xyz

Vo: What is you salary?
Wife: 23000

Vo: Is this before tax?
Wife: Yes

She typed for 30 sec and said sorry your visa can't be issued. She did not look at the sponsorship letter or any other documents. All were very disappointed, been told that if apply with the family the chances are much higher but I guess that's not the case.

All the best to everyone!!