Almost none of the things mentioned as "cash sinks" are "true" cash sinks in Disco. The only true cash sink is FOW POB maintenance and the various SRP requests.
Another candidate is when a special equipment gets blown off and the player docks (and who the hell does that instead of suiciding?).
A cash sink usually means a recurring cost, or, as already mentioned, something that players can't easily transfer.
The thing is, I believe that due to the size of the game universe and the amount of content the cash inflation seen through the eyes of a new player isn't too bad.
The problem is endgame, once you have funded a dozen of caps for your favourite factions and gotten a POB that can actually earn some profit you are basically set for life.
There is an obvious lack of end game content. For factions it's even worse, I'm pretty sure some have hundreds of billions in credits and equipment.
