actually, aviation is safer because thankfully we do learn from our mistakes. The vast majority of accidents are caused by human error and processes and procedures have improved across the industry. Let's also remember what the US FAA establishes as law is viewed as the standard by which other countries set their laws.
In other words Deregulation has nothing to do with making it safer, however the possibility reamains that financial pressures may have held it back from becoming even safer, more than likely deregulation has made the airlines less dependable as far as delays and cancellations.
To me deregulation in itself was not what hurt workers. What hurt workers was the abuse of bankruptcy laws and an unprecidented attack on the Labor movement initiated by Ronald Reagn. Wages in the industry continued to rise in the early years of deregulation, the turning point was Patco and frank lorenzo. In both cases the moribund labor movement stood by and allowed things to happen that they never should have. Capital has been on the offensive ever since. The only wages that go up are those who get jobs working as Union officials. Unions often look at the demise of one company, especially a competing unions, as a growth opportunity for their union and more dues to pay their wages. Many of these guys have little real interest in the movement itself, its just a job that provides them a lot better pay than where they came from. They often sympathize more with the company, despite record revenues, than they do with the workers they are supposed to represent.