Analysis
Tony Blair used the sentence in a speech delivered to the United Nations General Assembly on 20 September 2004, where he discussed global migration trends. The wording in the official transcript matches the statement provided. Multiple reputable news outlets cited the same line when reporting on the speech.
Background
In 2004, then‑British Prime Minister Tony Blair addressed the UN on the topic of international migration, emphasizing the importance of mobility for economic development. He highlighted that a country's health can be gauged by the balance of people wanting to enter versus those wanting to leave. The remark has been frequently quoted in discussions of migration policy.
Verdict summary
The quote is accurately attributed to Tony Blair in a 2004 speech on immigration.