> It's not false.
The two sentence unit I responded to ("Nope, the US does not have a skills based migration system. It's entirely family based.") is false.
Its possible to define "skills-based migration system" in such a way that the first sentence alone is true, and it might even be reasonable to do so; you'd have to use an entirely unreasonable definition of "family based" for the second half to be true. There are family-based, employment-based, and diversity-of-origin (which is also skill-based, in that it requires either a specified level of education or a specified level of work-experience is selected employment areas) immigrant visa (which seems to be what you are referring to as "permanent migration") categories.
> Over there, you can get permanent residence by being young, educated, skilled and proficient in English -- without a job offer. There is no such method here in the US.
On a diversity visa, you can get permanent resident status by being educated or skilled in particular jobs without a job offer here -- you don't have to be young, but you do have to be from a country with a low level of immigration to the US.
> In addition, our temporary work visas are extremely limited and cumbersome and capped.
Most (temporary or permanent, including most family-based categories) visas are cumbersome and capped. But I'm not sure why you address only "temporary work visas" and continue to pretend that permanent immigrant visas are only family-based, when that is not accurate. There are immigrant (permanent) employment-based visa categories, as well as non-immigrant categories.
> The system clearly favors "family reunification" over skills.
OR, given the permanent employment-based visa categories -- and ignoring diversity visas for the moment -- perhaps it just prefers actual employment as the concrete evidence of useful skills.