"The MRA for each Representative is calculated based on three components, including personnel, which is the same for each Member ($944,671 for each Member in 2014)"
"Each Member may use the MRA to employ no more than 18 permanent employees, a level that has remained unchanged for nearly four decades. A Member may employ up to four additional [part-time] employees "[0]
So each congressman can hire 18 people for about a million dollars total, including both district and DC staff and not including himself. That's a good size startup. Congressmen who do spend a lot of time fundraising (not all of them -- hundreds in safe districts don't bother) are like the CEO of that office raising the money while staffers do the work at his direction.
[0]http://library.clerk.house.gov/reference-files/114_20150106_...
