You're placing a lot of emphasis on everyone being a money grabbing bastard. It's not my fault if you and many others have an attitude of trusting nobody, that's your insecurities.
I have a lot of confidence in how the club is run, the integrity of the owners, management and playing staff. Why shouldn't I have? We've proven the model works over the last 10 years with the likes of Kompany, Zabaleta, Silva, Fernandinho and Aguero among many others. You'll always get the odd one (Tevez, Toure and what looks increasingly like Sane) who doesn't want to be part of the clubs future for whatever reasons, in some cases lacking integrity (Scarface's golf expedition), in others just because they want to move on.
You can't define your whole attitude to players based on those odd ones, it's counter productive and exudes negativity. Treat players and all staff with trust, appreciation and respect and you reap the rewards (in most cases, not all).
That's when you have to trust the club in bringing in not only the right players but the right characters as well, over recent years we appear to have been very very good at that aspect, so there's no reason to think it's suddenly changed just because Sane wants to leave. A lot of people are angry and frustrated and letting the emotions overrule them in one situation, without seeing the bigger picture of how it'll negatively impact the others. Tolmie very clearly said a few weeks ago Sane is very popular in the squad and they don't want to see him banished (I think was the term he used, apologies if not) to the reserves. That shows he types of character we have at the club.