IQ is a driver for income. Much better is EQ or emotional quotient. The way to make more money than other engineers is to get a poker read on what others are feeling, and adjust the negotiation.
There's no such thing as EQ. What's being called EQ, o the psylogical big 5 factor analysis is actually neuroticism, the measure of a persons stress resilience:
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell