No one outside your union can tell you specifically how or why they bargained a certain way. You should get involved more with your union and ask them these questions instead of posting here. Every union is different and they're obligated to explain these things to any member who asks. If any of it discourages you, then it is up to you to educate other members on why you think that's wrong and help get them organized for the next round of bargaining. A union is only as good as its active members.

If your Canadian union isn't working for you and the above doesn't help, then you file a DFR report with the labour board. Even mentioning DFR (duty of fair representation) should get you service if the union is being adversarial.

'Ask for more' is different from 'Get more'. The labor contract is a negotiation. Ultimately, the only card unions have to play at an impasse is a strike. If they use that tactict the workers of the union won't get paid while the contract is unresolved.

Let's say you're supporting your kid, don't have savings, and are offered a raise and some meager time off. Do you feel like you have the freedom to push harder, ie go on unpaid strike longer, or do you vote to accept the deal and get that paycheck again?

they hold more power for agreements, but it depends on the culture they're a part of.

tldr: The US is on the low end of employee rights internationally, so they get less compensation than other countries even though unions are fighting for employees constantly.

i assume you're talking about US unions since you're talking about 2 weeks of vacation, which is basically employee abuse in most countries.

Unions do have power.

If you didn't have unions, you wouldn't even have 2 weeks vacation.

you would have children working right next to you.

there would be no such thing as a sick day.

Unions are the reason you have the little employee rights and compensation you have in the states, and they're trying to get better conditions all the time, but it's very difficult in a country that's been and is being deliberately poisoned against a better work culture.

American work culture is crazy, so Americans think you're supposed to work all the time and your employers expect you to work all the time.

America is also obscenely expensive to live in for absolutely no good reason, so if you did take more than 2 weeks of vacation per year, most people wouldn't be able to afford to live inside, let alone provide themselves with food.

To get sick days or paid vacation, you and your coworkers have to pay into a fund for that to happen, and even though in the long run, better healthcare and more vacation would be a lot cheaper and more profitable for everybody, including the company, lobbyists have persuaded Americans that you're all fighting against each other and you shouldn't help anybody else because The only reason they're not receiving just compensation is because they aren't working hard enough, especially not as hard as you.

The math clearly shows that social benefit programs are better for people and more profitable for companies, but the culture you're a part of has been infected by self-interested corporate policies, so they're only interested in the profit part and not in the "better for people' part.

people in America are so poor amidst their surroundings and a lavishly projected culture that they feel pressured to work almost constantly, and so corporations siphon the value out of you and then cast you aside when you have no value left.

Just because your union has 2 weeks vacation that doesn't mean they all do.