If this is your concern, which I completely disagree with, I fail to see how requiring employees to get approval from the people you complain are playing favorites will improve the situation. It sounds like a scenario to make it worse.
You have given some examples of people abusing the policy, but your statement above makes it sound like that is the rule rather than the exception. I have worked in many stations, including yours I believe, and in my experience 99.9% of the thousands of CS's done each year are just people wanting to take advantage of the flexibility our jobs and our contract allows. I am skeptical that whatever bad things going on in any LAA station require a 24 hour policy remedy. I am also skeptical that 24 hours advanced notice will solve many problems. The people who abuse the system now will just abuse it 24 hours earlier. Not only do we have to worry about the company taking away perks little by little, now it appears we have to worry about each other. Punishing the majority for the mistakes of a few is a company thing to do. It really sucks that our unions want to do it now too.
It is enough to make me glad most of my career is behind me. This job used to be a lot of fun. I did not expect it to get better after 9/11 and bankruptcy. But I also did not expect our union to just roll over and accept a change that makes our schedules less flexible when it is not an expensive item for the company. I hope the TWU gang at least got a kiss from the IAM before they left that day because they were had.
And again, no, I don't do a lot of CS's. I just get irritated when people I pay to help make my job better, make it worse.