Once the wage subsidies end and some business start laying off staff, some people are going to have to take up these jobs, and I imagine these companies will have to pay more. eg at least minimum wage. IMO we shouldn't have ever been relying on low paid migrant workers to run a big part of our economy IMO. Some good may come out of Covid
They do have to pay minimum wage even if the worker is on piece rates, but I don't think they guarantee hours, so if there's no picking because of weather etc, then no pay.
A bin of apples is ~450kg, bin rate is ~ <$30, you need to pick >300kg of apples an hour to make better than minimum wage.
In my 20s some 30 years ago I spent 5 summers picking fruit on several different orchards around Hawke's Bay. On my own I could easily pick a bin of apples in about 1 hour if working from the ground, or using a hydra-ladder and about 1 and half hours if using a normal ladder. I was paid $15 - $18 dollars a bin depending on the variety of Apple.
If I was picking something small like plums I would get paid by the hour, about $11.00 per hour from memory, and that was 30 years ago.
Picking fruit is not backbreaking work. But you do have to turn up and work.