Bill Greenwalt argues the Pentagon’s biggest obstacle isn’t technology—it’s budget rigidity. While civilian agencies enjoy flexible funding, DoD remains stuck in a decades-old PPBE system that limits speed and innovation. Greenwalt explains how Congress must decide whether to modernize or scrap the system entirely, and why new acquisition models like portfolio-based investing can’t succeed without financial agility. The conversation highlights how outdated rules hinder competition with global adversaries and explores real-world examples of flexibility across government. Ultimately, meaningful reform depends on congressional will—and a shift in how defense funding is managed.