based on ideology and associated myths that have no empirical warrant. In the end, numbers are just numbers unless connected with data, and data are descriptive of real conditions involving real people and real resources. Economic policy is ultimately about real people and real resources, not numbers, although many "experts" don't seem to put this into their calculations about, e.g., "efficiency." MMT informs about the economic policy options based on consequences of stock-flow macro models, guided by accounting identities and operational realities, as models of real consequences. What MMT adds to the debate is, first, operational reality, so that debate is fact-based rather than myth-based, as it now largely is. Secondly, it shows how to achieve sustainable effective demand through income consistent with the desire to save and growth through investment, so that the economy is operating at full capacity and full employment along with price stability. Thirdly, it shows how to maintain this with constant adjustment for changing conditions, chiefly though fiscal policy. MMT is not monolithic, however, and there are different ways to achieve the same objective, e.g., lowering taxes and increasing government disbursements both add to nongovernment net financial assets, which supports effective demand when it lags. For example, some might counsel a payroll tax holiday now in order to support the desire to repair middle class balance sheets in what Richard Koo has called a balance sheet recession. Others might favor more disbursements aimed at the bottom, where they will surely be spent immediately, directly affecting