Free can be paid on behalf of the employee's social security company this is not a scam?

First of all, from the labor relationship, there is no real labor relationship and the payment of non-company employees of the social security must be illegal. Secondly, from the employee's point of view, although other companies pay on behalf of the social security, but when their own retirement needs to provide the appropriate company to prove, often a series of trouble. Finally, as the saying goes, the sky will not fall pie, this kind of payment on behalf of the employees of social security does have the possibility of fraud, personal advice or to think twice.