[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2011/images/08/30/costello_vert.jpg width=200 height=230 align="right"] From CNN's Carol Costello: During last week's GOP debate, Texas governor and presidential hopeful Rick Perry stood by his statement that Social Security is a "Ponzi scheme,"  saying "maybe it's time to have provocative language" because the current Social Security system will fail younger workers. Although economists acknowledge that Social … Continue reading Talk Back: Will Rick Perry's stance on Social Security hurt his campaign?