Answer:
1- Franking privilege, 2- travel allowance, 3- use of military hospitals, 4- free printing, 5- tax duction, 6-automatic pay raises, 7- a full pention, 8- free parking in many parking lots and garages through out D.C., 9- a lucrative 401K plan.
And around 2011 a congressmans salary sat at around $174,000 per year, and with benefits you figure it jumps to around $250,000 per year.