Pgp implemented a making it so that no single person was universally trusted to sign certificates.

Pretty Good Privacy implemented a certificate authorities making it so that no single person was universally trusted to sign certificates.A trust signature shows that both the key belongs to its claimed owner and that the owner of the key is trustworthy to sign other keys. Its  versions always contain or include  a way to cancel or revoke identity certificates. 

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Explanation:

Depending on the situation, Consider the reasons for the practice. Does it affect you or your pay? Does it affect the safety of others, yourself or even your boss? If so try and have a conversation about the practice with your boss. If things go down hill from there in the conversation, contact someone who can fix the issue or quit.