One of the major reasons plex prices have increased past year is the addition of skill injectors. This introduction has led to a vast increase of plex consumption through skill point farms and extractor usage.
The question is if this effect on plex prices is desirable from CCP’s standpoint. I believe CCP has stated in the past that they think there is an “optimal” plex price range, they were also actually concerned their mini plex change would tank plex prices.
If plex price control is desired, one way to effectively control plex prices is to introduce meaningful amounts of Plex rewards from loot drops and missions. Currently the amount dropped is pretty insignificant and I propose making more use of this. Varying the amount dropped gives almost complete control over plex price without directly affecting plex sales (only influenced by the reduced price). This will act as a counterweight to the increased plex consumption.
Of course the bounty isk faucets still need to be fixed to fix the skewed income distribution.