Yeah, I don't get that. There seems to be an assumption that the size of the workforce exactly matches the labour needs of the (maximum) number of orchards - 1. I can't see what that is modelling.
It seems to mean you can't have a labour crunch.
The fixed (maximum) number of orchards also doesn't seem to be modelling anything realistic; if apple prices go up and labour prices go down, I'd expect new businesses to enter the market.
Of course, labour crunches and new market entrants would make the game less stable, and economic collapse would be harder to avoid.
It seems to mean you can't have a labour crunch.
The fixed (maximum) number of orchards also doesn't seem to be modelling anything realistic; if apple prices go up and labour prices go down, I'd expect new businesses to enter the market.
Of course, labour crunches and new market entrants would make the game less stable, and economic collapse would be harder to avoid.