100% of everything they do or have available is publicly available. Just look up FEDERAL RETIREMENT OPM (that's for office of Personnel Management ~ they run the plans).
Regarding management signing the contracts, postal workers are under a NO STRIKE LAW. Instead the law provides for BINDING ARBITRATION.
The Arbitrators have historically ignored every management offer and all economic studies and imposed, through binding arbitration, the union requests on the organization.
Go see your Congresscritter about BINDING ARBITRATION. He'll answer all your questions (if he's sober).
Concerning binding arbitration, You are correct to a point that Arbitrators end up siding with the Unions on many issues, but not all. The Unions have their place in this mess, but many times Management rejects ideas that come from carriers that make the job more efficient. Let the people who know how to do the job, do the job. Carriers are micromanaged to the point of paralysis. We have had 6 routes sit vacant for almost 1 year. We have hired 1 carrier in the last 11 years. This is supposed to be a service job, yet management refuses to hire enough people to do the job, preferring to force carriers to work overtime on a daily basis to cover vacant routes and providing poor service by delaying the delivery of mail. Yet, there is NEVER a shortage of floor managers, district mangers, facility mangers, etc. It’s a disgrace! Carriers are told by management to delay mail. You get fired for driving a block with your door open on a 95 degree day. (UPS and FEDEX drive all over with doors wide open) Because of stupid decisions by management, they prefer to pay carriers overtime to sit at home rather than hire. USPS is a visible company, but you on the outside who think you know how it operates, you don’t! If you want to know, try to get hired for one of these high paying, great retirement, great perks jobs! My guess is in todays environment, you won’t last a month. But give it a go.
HYPOCRITES!