Unemployment effects the economy in ways that most people do not visually see. If more people are unemployed, less people pay taxes or have money for spending. Spending money boosts the economy through taxes which is why everything is taxed. The taxed money adds up when everyone shops. If one is unemployed, they live on what is saved or what unemployment departments give them. Therefore, they do not have money to be frivolous, they only buy necessities.
Also by not having the money to buy wants, not only needs, it means some business will have to cut prices in order to try to sell. By cutting prices this leads to less, no, or sometimes negative profits. Enough of this happens and that business might go out of business which leads to MORE unemployment. All of this leads to deflation which could lead to a depression (like it did in the Great Depression). Deflation does not encourage spending, in fact it does the opposite. Also your dept numerically stay the same but now you earn less so it will be even harder to pay them off