ZippyNH

Having worked for a couple operators, I can state that once you are the industry leader, the operator GENERALLY writes their own minimums, and as long as loss rates are not too high, it' all good....most companies self-insure for most mishaps to a large extent, through LARGE deductibles that mean MANY mishaps occur before a claim is made. Typically it's after people DIE that numbers take a jump, even if temporary, to placate owner, the FAA, and insurance companies.
Pretty sure tweaks are more about matching supply and demand, and to ensure that the training department meets pass rates. Everybody always wants to think that they are the "special case" but at a bigger company, it's a numbers game, filling seats, and staying within goals and budgets.
Let's face it... quality multi time is hard to come by, and much of what some people show up with is what I call "junk" time, often riding with an owner, or helping another pilot, and the legality is often iffy at best. Higher numbers simply help to keep more of those Parker p51 pilots out of the system, as they often wash out.