Building a Retirement Income System — Thinking Like an Engineer

By Jessica Arnwine, CAER Financial Group | caergroup.com

The Systems Approach to Retirement

A retirement income system is an engineering problem: you need a guaranteed output (monthly income) from inputs (accumulated assets) that remains reliable under variable conditions (market performance, inflation, longevity) for an uncertain duration (your lifespan).

Good engineers build redundancy. They design for worst-case, not expected-case. They separate critical systems from volatile ones.

Applying this framework to retirement:

The Three-Layer Architecture

Layer 1 — Guaranteed Baseline (Non-negotiable income)

Social Security (optimized claiming age)

Fixed annuity / MYGA income

Pension (if applicable)

Purpose: Cover 100% of essential monthly expenses with certainty

Layer 2 — Protected Growth (Capital preservation + growth)

Fixed Indexed Annuities

IUL cash value

Conservative bond allocation

Purpose: Inflation protection, healthcare…