Some VB developers earn less than others, based on age and gender. Young developers earn less overall than their older colleagues because of their low experience level.
Older developers have the opposite problem.
Salaries of programmers over the age of 50 start dropping, sometimes because older programmers have too much experience for the available jobs. I'm just overqualified. An interesting statistic emerges for female developers. Not asking for more benefits might also be an issue of aggressiveness. Male vs. Female Developer Salaries.