One in twenty.
That’s roughly the unemployment required for our economy to function. If more people get employed, then there’s a shortage of labour. This makes it harder for employers to find employees. 5% of our population must be unemployed. We call them lazy, deadbeat, a drain on society. We require them.
With unemployment above 5%, it creates competition amongst labour. The workers must then compete for jobs. Employers have more power. If it’s below 5%, they lose that power. Workers can demand more rights. Employers cannot threaten unemployment . Labour becomes strong.