Asked and discussed many times. It has to be that way to avoid misuse (you could push the price and then opt out, driving up the price for later bidders without risk for yourself).
Besides, i have won two actions today, after twice being outbid more than once, and still got the planes… probably because a lot of airlines make a re-start in the beginning, so that in the end my offer stands as highest.
The system makes a lot of sense, certainly for players that just started to play AS, giving everyone a fair chance on a plane.
Sure, you write a script, this script shadows the leasing costs, all aircraft lower than 100k are ordered, else they jump to the next, so a few people can get all the right planes. No its not cheating its smart.
I check with our it department and yes this is easy and there is no check at as for this. So this is one of the ways to cheat legally.