Why did the Articles of Confederation need to be changed?

A loose confederation of sovereign states and a weak central government were formed by the Articles, leaving most of the power with the state governments. The need for a stronger federal government quickly became evident and finally led to the 1787 Constitutional Convention.

Explanation:

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.