From a press release:
According to a newly released Stony Brook Poll conducted in association with Left Right Research, a Long Island based Marketing Research supplier, more than 81 percent of approximately 7,000 people surveyed believe that they had contributed enough to Social Security to support themselves in retirement, or more than they will receive during their lifetime. ...When asked about how much they believed they had contributed to ... Social Security during their best paid year, more than 2 in 5 individuals surveyed were wrong by 50 percent or more regarding Social Security contributions ...
One of the reasons that many people believe that Social Security is a bad deal is that they believe that they have paid far more in FICA than they actually have. They think that if they had just invested this money for themselves that they would be wealthy. FICA is not high enough for that to be possibility.