paragraph question

With the declaration of the war, the Canadian government immediately became much more involved in the planning and and control of the economy. In April 1940, the government established the Department of Munitions and Supplies, and King appointed C.D Howe as its minister. Howe was given extraordinary authority to do whatever it took to gear up the economy to meet wartime demands. He told industries what to produce and how to produce it. In his direct, impatient manner, he convinced business leaders to manufacture goods they had never made before. Soon Vancouver was building ships for the navy, Montreal was constructing new planes and bombers such as the Lancaster, and Canada's car industries were producing military vehicles and tanks. Munitions factories opened in Ontario and Quebec. If the private sector was unable to produce what Howe wanted, he created Crown Corporations to do the job. Even farmers were told to produce more wheat, beef, dairy products, and other foods. Under Howe's leadership, the government ran telephone companies, refined fuel, stockpiled silk for parachutes, mined uranium, and controlled food production. This was the policy of total war, with Canadians willing to do whatever it took to defeat the enemy.

Question

How did Canada's policy of total war change the economy? Why was the policy necessary?

I don't understand and I not find the answer

Canada's policy of total war during World War II drastically changed the economy by introducing significant government intervention and control. The government established the Department of Munitions and Supplies, headed by C.D Howe, who had the authority to direct industries on what and how to produce. This led to the manufacturing of goods that were previously unheard of in Canada, such as ships, planes, bombers, military vehicles, and tanks. Munitions factories were opened, and if the private sector couldn't fulfill the requirements, Crown Corporations were created to ensure production.

Furthermore, the government took control of various sectors, including telephone companies, fuel refining, silk stockpiling for parachutes, uranium mining, and food production. The policy of total war even extended to farmers, who were encouraged to increase their production of essential food items like wheat, beef, dairy products, and more.

The policy of total war was necessary for several reasons. Firstly, during times of war, the demand for military equipment and supplies increases significantly. By mobilizing the entire economy, Canada could meet these wartime demands and support the war effort effectively. It also ensured that the necessary resources were available for the armed forces. Additionally, the policy aimed to promote unity and a collective sense of purpose among Canadians, as everyone was expected to contribute to the war effort in some way.

Overall, Canada's policy of total war transformed the economy by increasing government control, diversifying production, and mobilizing all sectors to meet the demands of the wartime industry.