Steve believes that carlos is more responsible and capable than gus because carlos is from the management team while gus is the maintenance supervisor. this type of bias known as the effect.

This bias is known as The social status effect.
The social status effect. refers to the perception of someone to seem more 'capable' or 'superior' simply because that person held higher level of power.
This type of bias tend to be really different depending on what characteristic or status that is held as 'valuable' within a social group.