I'm not sure I get your logic. During the last 50-100 years: the population was continuously growing, the percent of employed population was continuously growin

I'm not sure I get your logic. During the last 50-100 years: the population was continuously growing, the percent of employed population was continuously growing (women entered workforce like never before), the retirement age was always growing together with life expectancy. Do you really think all that growth is negated by "some percent of population entered workforce ~4 years later" and "some percent of people got fired since 2007" ? edit: I no longer bet you are an employer.