First, you are privy to the arguments. Just read back several pages, in general chats, bugs, and suggestions. You can read all those information you are asking for. Therefore, I don't understand your complaint when you have not put enough effort into solve that issue yourself.
Second, this is airline mogul. I could argue that airlines operate hotels, CD stores, cruise... etc. (See EasyJet and Virgin's). Do we need to add those in here as well? They are at least somewhat realistic while brokering new planes has never been a business for airlines.
Third, as I have said, this is not my issue that someone else have to pay more for the same thing. I understand perfectly well that having someone finance a plane for you is a premium service. However, ask those players out there. 90% of them do not understand that, and 60% think we are already overcharging them with 1% profit.
Fourth, it is not the issue of whether it is a premium service. It is more like when you could pay $1 for something now, why would you ask to pay $5 for the same thing tomorrow (assuming no inflation / inflation in one day is less than 500%).
Fifth, when you said you don't have to be using the plane precisely at 24 hours, that is BS. It is only your perception, while fact is, if you don't get the plane precisely within the hour that is it ready, you are leaving it idle and wasting the chance to make profit out of it. You are just giving unwarranted excuse to yourself, or you don't understand time-value-money. Either way, that concept is incorrect.
Sixth, this would not free up more time for the current official brokers. This would get rid of them. Those are concepts that you should be able to differentiate and please don't ask me to argue why they are not the same.
Seven, we are not the one who dismiss your "suggestion" because of realism. The majority of players are saying that official brokers should not have airlines because of realistic reasons, and we are trying to address that. (In fact, we have come up with a solution of which Stephen and Will rejected.) Seeing that on this topic, realism trumps playability for the majority of players, there is no reason for us to go against them and allow airlines to broker. It is only fair in that case. You can't have everything you want at the same time.
Eighth, continuing on the previous point, as you have pointed out, this is an on-going debate and for a very long time. Can you at least give us some credit that we have debated it? Would you consider that we have thought this out before your "suggestion"? Have it ever occured to you that your "suggestion" is new only to you, but is well worned for us and that a decision have already been made long ago? Relating back to the first point, please read the old post on this topic.