When you have millions of graduates a year, which economy can take in so much workforce? Not even China. See how even the post-00s want to 躺平, wait for the inheritance from their parents by learning from the 富二代.
Most of the PRCs joining the war are those post-90s, can’t match the late Gen X and post-80s in terms of resilience and unable to earn a living in their own country. Joining the war could at least provide them with some income.