So, I guess you don't think immigrants aren't THAT cool.
The government sets quotas based on several factors. If they decide we need more, then ok. But not just because of nothing.
Actually, no there are no quotas. Congress sets the maximum number immigrants at about 675,000 per year plus about half dozen categories of immigration that pushes the total to about a million a year or higher.
Then the law establishes the maximum number of immigrants from any country as 7% of the total, about 70,000 excluding certain categories. However, this figure is reduced by the number of legal residents from that country living in the US who change immigration status to permanent resident. Immigrants being sponsored by family members further reduces the number as well as employment sponsoring and other categories of immigration.
So for most countries if you do not have family living in the US or have special skills that will attract an employer to sponsor you or you don't fit in one of the other special categories, you simple can not immigrate to the US, no matter how long you wait.