The 'proper' salary for a job depends on the productivity of the job. It is perfectly possible for a low-producing the job in Switzerland to be too low paid for natives to want to do it, and yet well-paid enough for immigrants to want to come do it. This is what the GP was alluding to - barbers and cleaners and builders and nurses are all dominated by immigrants because they are hitting the productivity wall.
Looks you forgot yours at home. Lowering expenses (so wages) in a competitive free market works exactly like doping in cyclism: you'll be forced to if you want to stay alive.
But even without considering that, the business-owning "bourgeois" class not caring about their nation has no reason to be left unchecked by those whose job is to run a country.