Perhaps the best way to summarize paysecrecy is to say that it has become an old-fashioned, obsolete management practice that has a much larger downside than upside.
One final point about why paysecrecy is an obsolete practice: as already mentioned, when pay is secret, managers are often tempted to make and do make indefensible pay decisions.
The Ohio Senate today is scheduled to consider a bill that would end the secrecy surrounding trusts set up by bankrupt companies to pay out asbestos claims.