The pathway for foreigners to come into most countries is through a visa process, which are capital investment, work or asylum based. For example, in the US an

The pathway for foreigners to come into most countries is through a visa process, which are capital investment, work or asylum based. For example, in the US an investment of $500k (will be $900k later this year) in certain businesses will land foreign individuals a green card. Otherwise, they'll need to come in through a family or work visa, latter of which can take years and has high barriers to entry, like requiring sponsorship or a specialized degree. Those without means are going to have a hard time leaving the country legally.