First Principles — What Money Is, and Why Engineers Underinvest in It

Articulate three definitions of money (functional, historical, political). Explain why r > g matters for your personal time horizon. Name the cultural barriers that have kept a person who models distributed systems for a living from modeling their own cash flow. Compute the conservative lifetime cost of your own under-anchoring and under-investing to date. Produce the foundational artifact: a one-page Personal Operating Model — not a budget, an operating model. This is the git blame step plus the post-incident review, run on your own avoidance. The patterns are mostly cultural and professional, not characterological — engineering culture rewards craft for craft's sake and treats money-attention as vaguely impure, the way some teams treat ops work as beneath the "real" engineering. Both prejudices cost the people who hold them. And the operating model is exactly what its name says. Savings rate is gross margin. Emergency fund is runway. Lifestyle inflation is feature creep that raises COGS without raising top-line — founders are ruthless about this in their companies and sentimental about it in their lives. A salary you couldn't replace is single-customer concentration risk. You would never invest in a startup that couldn't produce this one-pager about itself. Until this module, you were that startup.