Thanks for your help. That is such an old, lazy protest against sororities and fraternities. Try something new for a change. Greeks do a great deal of good, raising thousands of dollars for worthy causes each semester. The dues Greeks pay for membership are no different than paying dues to belong to, for example, The Society of Technical Communication or The American Medical Association.
Dues go to pay for the operation of the chapter facilities and other expenses.
NOT, as you state, to buy friends.