Answer:
John buys a toy plane from a toy store. The money he pays the store is injected back into the economy through the employee's wage and the taxes paid by the store.
Step-by-step explanation:
If John buys a toy plane from a toy store, only John gets the benefit of using the toy. However, everyone benefits from the fact that he spent money. The money that he spent at the shop is injected back into the economy through the wages that are paid to the employee and the taxes that are paid by the store. Therefore, keeping money in circulation benefits everyone. In fact, one of the main problems of a crisis is that people do not spend money, which negatively affects the economy.