I'm guessing OP (Right term? I'm new to this!) is referring to immigrants, at least in Europe, typically depending more on the state for assistance and having much higher unemployment rates, thus having more immigrants would place a higher burden on public finances. This is from Wikipedia regarding Sweden: 'First generation immigrants, for example, constituted 60% of economic welfare recipients in 2016, 73% of all unemployed and 53% of those serving long prison sentences.'