I would want to make sure that everyone has to go through with it, regardless of financial or social status. No “senator’s son” deferments, ya know?

That's the most delusional idea I've seen in this post - and that's a very high bar to cross. Even if you disregard the fact that said senators are going to be the one fine-tuning the rules (and other rich and powerful people "assisting" them) - keep in mind that the people of the Elite class:

• Have access to lawyers and consultants that can find ways to game the system.
• Have connections with the people in charge inside the system's hierarchy, allowing them to arrange better treatment for their children.
• Have connections with the people supervising the system.

Their children's conclusionary service will be more pleasant then your children's. Trying to make them suffer won't really work, and you'll only end up making an already atrocious ordeal worse for everyone else.

Regarding the complaints, I hope you understand that:

• Darker skinned people will get disproportionately more complains. The darker the skin, the more complains you get. You said "verified" complains - but the managers in charge of "verifying" the complains will be more inclined to approving complaints against them.
• Neurodivergent people - depending on the way their neuro diverges - will also get more complains. In this case this increase in complains may even be justified, but... congratulation - you are now punishing them for being neurodivergent. This means, of course, you'll want a to give them accommodations. Good thing neurodivergent people are all the same, and that the managers in this system will be understanding, so these accommodations will go to who they need to go to and won't be taken advantage of.
• The people of the Elite class have connections with the people in charge of verifying complaints. Disproportionate amount of the complaints against Elites will be rejected.

This will be good for the ruling class. Rebellious individuals from the lower classes will be punished, shaping them into easier-to-rule-over subjects.