Its not hard really, companies fail, markets change eg Amazon has the potential to create jobless figures here in NZ that will surpass those of the 1930s. Work and Income cannot create jobs they can only put candidates forward and at that point they are in the competitive job seeking environment. There also needs to be a change in attitude in NZ, there is a 'NIMBY' attitude in many employers and while they want benefit numbers to drop they do not want these candidate sin their back yard. Having said that there are many great employers that take a good many candidates offered by Work and Income.
Yet every week or two you see some sector or business on the TV complaining that they can't find employees. I.e. jobs are available but they can't find people for them. This includes relatively generic labouring jobs, that almost anyone could do.
I know people in Northland for example who struggle to find employees to drive forklifts, even though they are prepared to fully train people. Yet Northland has high unemployment and economic deprivation.
I have a client who is probably the largest employer in Kaitaia, which probably has the highest unemployment in NZ.
They have jobs vacant and considerable difficulty filling them - mainly because of mandatory drug testing. The secondary issue is employees who decide after a few days that it's too much like hard work and don't bother turning up anymore.