Portal Masters in large cities have a good social standing and high praise from lots of people.
Merchants, nobles and other important people often require the services of a portal master. After all roads are for the poor.
The Portal Manager has a Portal Chart of the portals in the area he is assigned to wich means if you have to go somewhere using a portal you always consult a portal manager.
They have a lot of power they know where people go and where they have been. This often means they are often asked favors witch they can use to get something they want. For example a murderer slips through a portal the gaurds need to know where he went and how to cut him of therefor they need a good portal master.