As a recruiter what would be the best response to the pushy candidates asking about the salary package but you are not allowed to tell the information?

Say, "The package is obviously an important thing for both parties.  However, this client prefers to discuss it at a later stage in the process, once they have started to get to know you and you have started to get to know them.  We find that candidates who are impatient on this point tend not to get to those later stages."

The package will depend on the potential and will declared at a later stage at the time of final negotiation however, it will be the best in the industry.