They will, of course, write a book about all the injustice and misuse of the troops as soon as they leave the service but do nothing about it when they have the chance.
As your blood boils, you display your lack of understanding of the beast.
They will not of course write a book as soon as they retire, they will write a book as soon as the writing on the wall is clear. Once they can see that no more honours are coming their way, then they are freed from the shackles of selfishness and can promote whatever bollocks seems likely to get then on tv (for a fee) or a few well paid newspaper inches each week.
What we need is some way for a vso to accept that he's not going to be anything else, and he can tell tales. I suspect that most of them will tell you that they need to cling on to power and keep climbing (which can't be done if you make waves) in order to reach a dizzy height in order to be taken seriously when they highlight the injustice done to the troops.
Anyone who gets caught misbehaving, and therefore has no prospect of a peerage, will be dismissed as being the bearer of sour grapes if he or she speaks out against the MOD.
The ever present carrot of rewards in the political afterlife, mixed with greed, ensure that however brave our leaders may be in combat, they can be bought off in administration.