For the U.S. economy, the demographic tailwinds created by these high-population cohorts could be significant, delivering the kind of “youth jolt” that the Baby Boomers were famous for. However, according to a recent report from Morgan Stanley Research, the implications of these demographic shifts aren’t baked into current Congressional Budget Office forecasts, in particular, the projections for labor-force growth.

Work by the firm’s economic team, along with an in-depth survey of Generation Y and Z consumers, uncovered a significantly brighter outlook for the U.S. in the coming decades than previously thought. As Gens Y and Z combine in the workforce, these two outsized generations could power higher consumption, wages and housing demand, all pillars of GDP growth.

In addition, these new projections on labor-force growth could also mean a rosier outlook for Social Security and Medicare solvency, offering investors an overall bullish view for the U.S. between the 2020s and 2040s—and policymakers a different perspective on the road ahead.