Aged Pension, page-36

The dole is your insurance paid so as homeless, hungry, unemployed don't go breaking into grannies house, beating her up and stealing her wedding rings. Take away the dole and the next hungry druggie will be bashing your door in.

Unemployment is also the pool of workers needed to prevent wage explosion. If you cannot find staff because there are no one unemployed then you must offer much higher pay to poach staff from another business.