In most of the people's mind, money is a standard unit of value. Just like using meter to measure length and using kilogram to measure weight, people use money to measure value

Based on proven economy theory, value is decided by supply and demand: More supply and less demand will decrease the value, vice versa. However, this does not apply to money: Money can be used to purchase anything, the demand for money can be regarded as infinite. When demand is close to infinite, the supply will not change its value in any significant way. So for average household, the money's value feels the same for them regardless of money supply