Capitalism creates a pyramid structure with old money on top and new recruits coming up from the bottom. Capitalists require an ever-increasing influx of new recruits to keep a capitalist system thriving. Without a growing domestic population, capitalists must seek new markets overseas. If the pyramid is no longer able to grow, the bottom tiers begins to feed off the tiers above them, with each tier becoming more violently resistant to the parasites feeding from below. Civil war results as the stronger oligarchs sacrifice the weaker oligarchs to feed the mob. The end result is Tyranny.
Nations that make use of fractional reserve banking are so awash with cash that they can't spend it fast enough. If their citizens learned the truth they would begin to clamor for the reduction of taxes (the long-awaited "peace dividend"), so a complex accounting method has been invented to hide this embarrassment of riches. Wars have proven to be the only way to allocate this giant wave of fiat money the government must spend every year.
How do you get a dollar, freshly "minted" by the Federal Reserve, into the hands of your average Walmart shopper? Qualitative Easing allows Fed Cash to flow directly to the Federal-check-receiving half of America. However, the working half has been getting stiffed because corporate America, although direct beneficiaries of cheap Fed loans, is unwilling to risk all that cash in the open market. So they have been sitting on it, collecting interest, instead of injecting this money into the economy. Low interest rates are meant to push corporate cash down to the consumer.
Central planners lower interest rates to force savers to buy things instead of squirreling away their cash for a rainy day. Low interest improves "inventory turnover". Negative interest rates are an even stronger incentive to spend that cash instead of saving it. Since negative rates will naturally push consumers toward a barter economy, central planners will have to invent favored methods of saving (probably virtual cash) that will reward the user socially or monetarily. Your SocScore will be a combination of monitored social behavior, reported private behavior, educational record, work record, criminal record and credit rating. High SocScores are required to get into good schools, obtain good jobs and get loans at reasonable rates.
If savers require even more encouragement, social media is always ready to inspire fears of global financial collapse, bail-ins and/or zombie apocalypse. People suddenly become eager to liquidate their savings when they are convinced that their fiat money is not worth the paper it is printed on. Low interest rates and fear are liberally employed to impel citizens to pump up the economy in a very real way.
Note that there is a particular type of scammer on social media that makes use of the fears injected by the state media organs to make money for themselves. They buy commodities in the dips, then piggy-back on the latest fear stream media campaigns to dump their commodities on the highs. Gold Bugs and Silver Bugs are the most ubiquitous of these Internet shills.