I mean, if you look at the ranking site aligulac, you will see players on relatively wealthy teams, who are paid to play under the banner of their team, and who are taken out of the ranking, because they haven't played a competitive match for too long! (players are taken out of the ranking, if they haven't played a documented match in two months.)
Also, again with the hope of that it is not my imagination, I think that there is a large pool of relatively unknown players, who – week after week – continuously compete in lowly paid cups, and who repeatedly prove that they are legitimately good players by placing high in most of the cups.
If so, well, then good luck on trying to keep up with the Korean scene. Even pre KeSPA, they managed to create better players with less money in the scene.
Note: I am not saying that all inactive popular players are bad. In fact, most of them were extremely good at a point of time, and they might even be very good right now. But the fact that they appear to be in some "ivory tower" compared to the rest of the players has to be extremely demoralizing to all up-and-coming players.