Which country has rich immigrants without immigration supervision?

Basically every country has an immigration supervisor.

Canada requires permanent residents to live for two years within five years after obtaining an immigrant visa to retain their permanent resident status.

Simply put, if you have an American green card, you must land in the United States once every six months and live in the United States for three years within five years.

Immigration New Zealand is special. After getting PR (permanent resident visa, valid for 2 years or 5 years, different types of immigrants, different validity periods), you should stay in New Zealand for 184 days (that is, half a year) within 2 years from the date of your first entry into New Zealand; Or five years, at least 240 days a year (that is, 9 months, half a year).

In particular, unlike other immigrant countries, New Zealand immigrants can only obtain IRRV (indefinite return resident visa) if they meet the above residence requirements. As the name implies, you can stay in New Zealand for a long time (because you already have PR permission) or you can enter and leave New Zealand at any time (even if you don't go back to New Zealand for a long time). This visa is always valid.