These conversations usually go along this line:
Idiot: they should get rid of the cap! Why don't people pay SS tax on all income? It's not fair!
Me: umm, you realize the calculation for benefits and the cap are one in the same? This means any tax paid on money over the cap is not receiving the benefit of at least some return from the system.
Me: umm, it's logical and somewhat fair even given that Social Security if a welfare plan.
Idiot: IT'S NOT...