Remember how I said that you can either have welfare or mass migration? Here’s one example why:
Social Security is already so engorged that nobody can explain how to make it economically viable. It’s simply a fact. All of the hand-wringing about the evil Republicans who want to cut Social Security is a smokescreen for what caused the program to enter into a state of agony.
If there’s mass migration, there won’t be welfare protections in the widest sense of the word. There also won’t be many of the constitutional protections. Welfare and a constitution can only exist within a nation-state. If there’s no nation-state, there’s no constitution, no Social Security, no police, no Medicare. It’s a dog-eat-dog, crime-soaked, scary and miserable global shantytown.
Clarissa's Blog 
The most important parts of social security are pensions and health care for the elderly. Historically, people expected their children to support them in their old age. Social security expects the state to support people. This creates a classic socialist free rider problem where people have less children while expecting other people’s children to support them, which results in the need to import workers to fill the gap
LikeLike