Congressman Burlison: about two third of members of congress want to add notches to their belt

How many are serving in congress for the right reasons?  

7th District Missouri Congressman Eric Burlison told Newstalk KZRG:  “Probably a third of the people that go into congress are true believers that want to do the right thing.  I would say the remainder, most of them want to build their title, build their power, build their reputation, add more notches to their belt.  They feel it’s the next rung on the ladder.”