If anyone could thoroughly answer these questions with 1-2 paragraphs and explain why you think that. it would be great thank you

Many financial planners suggest you not invest money until outstanding debt (excluding a mortgage) is paid off. Do you agree with this approach? Why or why not? What other factors do you think need to be considered by households or individuals when making this decision? What do you think would happen to our economy if all purchases would have to be made by cash