relegated teams get the following
Seventh - 4 mil
Eighth - 2 mil
div two prizes are
Champions - 14 mil
Runners up - 12 mil
so the best a team could hope for cash wise would be, over the two seasons, 4mil + 14 = 18 mil.
Bear in mind this is best case scenario, thats an average of 9mil per season, which would equate to between fith/sixth in the top league. On that basis, maybe it is slightly high, but wouldnt say overly so when you consider that would be for an ideal deliberate relegation.