Short answer: In most advanced economies—especially those with aging populations—halting immigration would make labor shortages more common and more persistent. The effect varies by time horizon, sector, and how flexible wages and technology adoption are.
Why stopping immigration tends to create shortages
•Demographics: With low fertility and rising retirements, the domestic working‑age population grows slowly or shrinks. Immigration is a major source of labor‑force growth; removing it tightens labor supply, particularly over the next 10–20 years.
•Sector mix: Immigrants disproportionately work in both ends of the skill distribution—caregiving, agriculture, hospitality, construction, and also STEM and healthcare. Cutting inflows hits exactly the sectors already facing high vacancy rates.
•Geographic matching: Immigrants often move to booming regions and accept schedules/conditions locals avoid, easing bottlenecks. Stopping inflows reduces this matching function.
•Training pipeline lags: You can’t quickly produce nurses, engineers, or welders. Without immigration, backlogs persist while domestic training scales up.
What could offset shortages (partially)
•Higher wages and better conditions can pull in more native workers, older workers, and people with caregiving responsibilities—but this takes time and raises costs/prices.
•Automation and process redesign reduce labor demand in some tasks, though not easily in hands‑on care, many trades, and services.
•Offshoring/remote delivery can substitute in some occupations (software, some design, back‑office work), not most in‑person jobs.
Likely outcomes if immigration stops
•More vacancies and longer hiring times in care, healthcare, food/agriculture, construction, logistics, and some high‑skill roles.
•Faster wage growth in affected jobs, alongside higher consumer prices and project delays.
•Slower overall GDP growth; per‑capita effects are ambiguous (some workers gain from higher wages, while higher prices and lower dynamism offset).
•Stronger push toward automation and offshoring where feasible.
Bottom line: Completely stopping immigration wouldn’t eliminate labor shortages; it would generally worsen them in the near to medium term. Targeted immigration policy (aligned to demographic gaps and sectoral needs), combined with domestic training, childcare, and later‑career work incentives, is the surer way to reduce shortages.
If you tell me the country and sectors you care about—and your time horizon—I can size the impact more precisely.