Let’s talk about the concept of surplus. As adults each of us has the primary responsibility of taking care of ourselves, first and foremost. That involves providing the goods and services necessary to survive on a day-to-day, week-to-week, month-to-month basis — the air, water, food, sleep, clothing, shelter, etc. Over and above that it is necessary to use our limited time, energy, resources and funds (TERF) to fulfill any obligations and commitments that we have taken on. Let’s call that our primary objectives. Either we produce the goods and services required to satisfy those objectives ourselves or we purchase them with the income received from the goods and services we provide to others.
Here is how an individual and the aggregation of individuals — what economists call the household — can decide to use its disposable TERF (the amount left over after satisfying the primary objectives). Some of it can be used in the following ways: to increase the consumption of goods and services; be put aside for future consumption — into saving; used to pay off previous loans; or assist other individuals and households that do not have sufficient disposable income to survive long-term. Some of the funds can be set aside to cover unexpected expenses. Or can be devoted to the attempt to develop new products or processes of production — innovations (some of which may be successful) or used to create works of art, or anything else the individual or household may decide to do with its remaining TERF.
Any income that we have left over after fulfilling the primary objectives is our disposable discretionary income — the surplus. The left over funds can be used for anything else we choose to do with them. How we choose to use the surplus is up to each of us. For those at the lower-end of the income distribution—almost all, all and sometimes, even more than all of their disposable income is used up just to survive. The more of our income that we are able to withhold from current consumption, the greater the surplus.