What do you call the lawyers? they can't always win but they get the money for doing their best.
Lawyers are providing a service others cannot do for themselves, and will have at least a chance of winning.
It has been pointed out by bill gator that not only are you not providing a service that the user could not just do themselves, but you are in fact barely providing any service at all:
If anybody has been a victim to suchmoon's abuse of power, this is your chance to be heard, let us pile up evidences against him. hire me to spend my time and bring abusers to light of justice
So you want other people to come forward with their evidence and essentially do your job for you, for free? Why would anybody want to pay you to research suchmoon's "abuse" if they are also providing the evidence.
I can't force anybody to remove their tags
All you can do is present information that the person likely already considered before or after leaving their rating. You are offering to do nothing for a fee.
Additionally, you have already admitted that you have no control over trust, and therefore no chance of winning:
disclaimer: you are paying me for my time, not for my ability to remove your red tags, I don't have any control over trust network, I could only point out abuse of power, this fee is for my time.