the SMART way to downsize your population in the coming contraction

Vox | Japan's demographic time bomb, in one chart
Japan has a major demographic problem: 26 percent of its population is elderly, the largest percent of any country in the world. That's because Japan's birthrate is declining, as is its overall population. In other words, a huge chunk of its population is getting old and leaving the workforce, and not enough people are being born to take their place.