Why do farm drivers in Australia have high salaries?

Generally, small farms are owned by farmers. They have several jobs, driving trucks and holding various farm tools. For a large farm, farmers are managers, spraying seeds with airplanes and harvesting with combine harvesters. All of them are done by contacting specialized companies and professionals according to the appointment of crop growth period. There are basically no full-time drivers on Australian farms, and everyone is versatile. Now the vast rural towns in Australia are also hollowed out. Rural young people go to work and live in big cities, while urban people are unwilling to go to the countryside. Australia's climate is warm, and the harvest season is all year round. The farm lacks manpower, especially young and strong labor. Therefore, Australia opens holiday work visas to young people all over the world, especially Europeans, so that young people can travel around Australia, and it is right to work and play. Farm harvesting is paid by the box, and more work pays more. Of course, farmers also need to consider the cost. When the labor cost is higher than the purchase price, they would rather let the crops rot in the ground than someone do business at a loss. The vast majority of people who get holiday work visas from China are young people who have received college education and understand English. They despise these hard, tiring and monotonous farm work, while the industrious farmers in China will never get a work visa to receive this relatively high income.