To compare social investments with military spending, economists use several key performance indicators. For social investments, such as education and healthcare, metrics often include the increase in lifetime earnings of citizens, higher tax revenues due to higher employment rates, and reduced public spending on crime or chronic illness. These are known as social return on investment (SROI) metrics.
In contrast, military spending is often analyzed through opportunity cost. This measures the economic value of what could have been achieved if those same funds were directed toward infrastructure, technology, or human capital. For example, one can compare the multiplier effect of a dollar spent on teacher salaries versus a dollar spent on defense procurement. While military spending can drive specific industrial sectors, social investments typically aim to boost the productivity and health of the entire labor force.
Key metrics include the Human Development Index (HDI) impact, the rate of return on vocational training, and the reduction in social welfare dependency. By quantifying these factors, policymakers can better understand the long term economic stability provided by social stability and a highly skilled workforce compared to traditional defense expenditure.
