My experience says that the consulars are more supportive to people with government job. It happened in four cases as I know. Both of my parents are government officer and both of them got visa for 5 years. Same with my fiance. One of my friend's dad was government officer and mother was housewife. His dad only got the visa. In one more case, my friend's dad was sachib and he only got 4 months visa.
It looks the way I think. Just my 2 cents..