I used to be a prepress/printer, but I switched careers (4 years ago) and became a light-aircrafts mecanic/electrician.
I'm no more dealing with the same printshop (cough, cough) stuff because in the aircraft-servicing business (most of) the clients perfectly understand that their lives are at stake, and consequently they ask for the best quality job, (mostly) without arguing the cost, estimating that the price of their lives is way above the bills for servicing/fixing their planes.
And my english co-worker says (pardon him, this is english humour!) that at least with aircraft servicing, when something goes so badly wrong that the plane crashes, no owners/pilots can complain about the job, nor sue the company cause they often turn dead in the crash.