Work and Income New Zealand's website suggests that fruit pickers can earn about $400 for 30 hours' work. That must be "in the hand" (otherwise that's below minimum wage of $14.75). Job Seeker benefits go up to $210 net a week.
Local growers love the temporary workers - they come in under the Government's Recognised Seasonal Employer (RSE) programme, which allows companies to recruit non-New Zealand labourers. Some say it has turned the horticulture industry around, allowing businesses to realise their full earning potential. The workers are efficient, do the job and leave.
The local industry says it does employ some Northlanders, but the imported labour is essential to its success.
There is a suggestion that travel and accommodation costs mean seasonal work is not worth doing for locals. For some people this may be the case, but it seems there is a large labour force that is unready, unwilling or unable to work in the horticultural industry.
Some Northlanders, it seems, are too lazy to do the work. Add in the well known "coals to Newcastle" idiom and we're only a punchline away from an unfunny joke.