Because slow inflation maximizes the utility of having a financial system. You have a stable currency which allows for long-term planning, its slow inflation en

Because slow inflation maximizes the utility of having a financial system. You have a stable currency which allows for long-term planning, its slow inflation enables that growth (by forcing resources to be productively used), while also working to lessen inequalities over generations rather than exacerbate them (your wealth slowly erodes unless you do something with it).