That's your take on the matter and it does not reflect reality.
I'll take NZ as an example.... the unemployment rate is 6.2%. However, every year, thousands of foreigners are given work visas because the farming and agricultural industries cannot find labour to pick the fruit and milk the cows.
Up to 35,000 temporary work visas were issued to foreigners last year to keep the industries going. In the meantime, the unemployment rate remains at 6.2%
The reason for this is obvious.. why work under the hot sun or freeze your butt off in winter when you can sit in your backyard, smoke dope and drink beer and have your bank account credited with free money.
If welfare payments were stopped, all these useless layabouts would be forced to get off their asses and earn a living like the rest of us.