I don't know the backstory here but having 3 children in 3 years sounds quite normal to me. If you want 3 kids, and you want them while you're young, it makes sense to crank 'em out ASAP. I get that it must be pretty frustrating for the employers, but it also seems to be within natural human behavior (to me, at least).
No where did I say it was a 'vacation'. However getting paid to stay home, and raise your children sounds like a better alternative to sitting in a cubicle all day. If it doesn't, then you probably shouldn't have kids.
I think you're being a bit black-and-white in your thinking. Plenty of people have kids and love them, but also don't want to spend literally every minute with them. Or conversely, want to also do other things in their life.
Sounds like a good thing for Canadians. Otherwise you end up with no citizens and have to do bulk-level importing which is difficult.
A party in Germany recently proposed a E10K load, per child, up to 3. More kids meant you didn't have to pay off the loan. Sounds like a good way to help the birthrate. I think it was considered too racist to limit it to citizens.
To collect EI benefits, the individual must have worked 600 hours in the qualifying period (ie the 12 months before the leave starts). And I believe the max duration is 50 weeks, further payment requires another 600 hours of work.
Three consecutive years would involve a significant amount of unpaid time which (I'm going to presume you are American) you Americans are certainly able to take.