Some percentage of the retired seniors are parasites. There are a number of them that did not work at all or payed very little into the system. In a large number of cases, there are children collecting the benefits that a dead parent may (or may not) have paid into the system. There is a percentage of retired seniors collecting benefits that have no need of social security payments. Then there are the dead ones whose families or nursing homes are still collecting their benefits. So, yes, there are many parasites on the system.