I could not miss the opportunity to comment on this one, so I am back

. But I promise to get away when it becomes too boring here. Thank you, Valzazar, for making this comment which allowed me to offer an example where "pull up the ladder behind me" is completely rational and maximizes your own utility first and after such maximization is done, also maximizes the total utility of everybody.
Example: Titanic and lifeboats
1) There is no space for everyone to get on the lifeboats. Thus, if everyone were allowed to climb on them, the boats would go down, and everyone would die
2) It is not clear what the maximum number of people can climb on each lifeboat before it will go down for sure, but the more people climb, the higher the chance it will go down
3) When the probability in (2) is sufficiently large (say, above 10%), it is best for everyone on the boat not to let anyone else on the boat
4) For anyone in the water, it is best to climb on the boat
5) Once a person climbs on the boat, it becomes better for him not to let anyone else on that boat. Note that now his incentives become aligned with other people on that boat
Analogy:
Boat = Canada
People on the boat = current Canadian citizens and permanent residents
People in the cold water = people in third-world countries (except the rich ones)
We can extend this example by assuming there are some people in the cold water who come with their own inflatable boats that they did not have time to inflate, but once they climb, they will inflate them and that new boat can take several people from the original boat, reducing the probability that it will go down. The analogy will be high-skilled people. Unfortunately, it is too costly to check if the person has that inflatable boat with him before he climbs. However, we can look at whether a person carries a backpack while still in the water. We have no idea if he is just an idiot who tries to bring his belongings with him, or if he is so determined to keep his backpack because there is a floating device in it. So, we can let people with the backpacks on our lifeboats even if we have no time to check what is inside. Analogy: backpack = work experience, education, or simply country of origin
And a response to Franky about where he lied: when I replied to your post saying you are lying (see post #101), I specifically
made it in bold the part of your statement where you lied. To avoid looking ignorant, next time, please, read before you reply.