I think you're kind of missing the point I'm trying to make. There's no point in someone who can define a term for broader trends if they cannot balance a personal budget. The capacity to define a broader trend can inform budgets, but I wouldn't date someone who is shocked when they have no money left for food because they spent it all on a shoe sale. I wouldn't consider that person a functional adult even if they happened to be thin and understood nuances between cost of living statistical measurements.