Population increases don't immediately translate into worker increases
Population growth rates change over time, but it takes about 18 years before today's newborn enters the workforce. I'd like to see some good sources for the number of working age people, say 18-65, today verses a few years ago and compare that to the number of jobs for the same time frame. It wouldn't surprise me if you're right that the number of working age people has grown faster than job creation, but I'd like a good reference.