Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why does money value normally decrease?
Currently, the quantity theory of money is widely accepted as an accurate model of inflation in the long run. Consequently, there is now broad agreement among economists that in the long run, the inflation rate is essentially dependent on the growth rate of money supply. However, in the short and medium term inflation may be affected by supply and demand pressures in the economy, and influenced by the relative elasticity of wages, prices and interest rates - Wikipedia: Inflation causes You also asked "can you give any reference that explains that this [encouraging people to work] is one of the reasons government prints money?" See the list of positive effects of inflation in that article.