I have not seen the list you're referring to. I heard the minister on the radio saying that he would decide after the fact what is and isn't. But if there's a list, great.
The point is that under the current regime and under the regimes in place in every province except for Saskatchewan, which is on its way to the Supreme Court of Canada, the short answer is, yes, people don't trust the employer to exercise an unfettered discretion to decide, in the case of the federal government, who's essential to safety and security.
There are other criteria in other legislation, but in every other jurisdiction save Saskatchewan, that isn't done unilaterally by the employer, by the government. The employer can make a proposal, the parties bargain, and ultimately it's an independent tribunal that oversees that. That's recognized as necessary to maintain the fairness of the system. It's particularly critical here, where the government has the power to designate up to 79.99% as essential and force a strike because there's no access to arbitration.
I think the concern is that these are words that are flexible in their meaning. That's why you have oversight in every other jurisdiction by a labour board. As I said earlier, I'm not aware of any evidence to suggest that the labour board has gotten it wrong—if anything, unions are critical that labour boards are too deferential to the employer.
Nonetheless, there is some review. The complaint, just so you're clear, is that the right to review that has been a predominant feature of this legislation, and that in fact allows the government to determine the level due to a 1982 Supreme Court of Canada decision—the taking away of review is what people are complaining about.