Are social security numbers unique to America?
No. Many other nations have social security systems and assign numbers to citizens. The context notes that most small third-world nations have such systems, that every citizen has a number, that Germany once tattooed a social security number on newborns' heels, and that Great Britain has had one.
Les explains that America is not the only nation with a social security system. He notes that most small third-world nations have social security and welfare systems, and every citizen has a number. He also says Germany years ago began tattooing a social security number on the heels of newborn infants before they left the hospital, and Great Britain has had it. Les points out that people are already programmed to need a number: kids can't start kindergarten without one, and you can't get a driver's license or file taxes without it. He warns that in a completely cashless society, without that number you couldn't receive a paycheck. He connects these systems to the precursors of the mark of the beast, while stating the social security number itself is not the mark.