Why we overspend: advertising, comparison, and the biases beneath

Advertising’s actual job

Advertising is not mainly in the business of informing you a product exists. Economist John Kenneth Galbraith named its real mechanism in 1958: production, through advertising and salesmanship, manufactures the very wants it then offers to satisfy, a mechanism he called the “dependence effect.” Demand does not simply rise from need; a great deal of it is engineered. The itch you feel scrolling past an ad, a flicker of dissatisfaction with the car, the kitchen, the body you already have, is frequently the ad working exactly as designed, not new information about your life. Naming that mechanism out loud drains a lot of its power.

Comparison, now running on algorithms

Psychologist Leon Festinger showed in 1954 that people evaluate themselves by comparing to others, especially when no objective yardstick exists: social comparison theory. That drive is ancient; the delivery system is not. Feeds are tuned to surface whatever holds attention longest, which tends to be curated highlight reels: the renovation, the trip, the upgrade. Recent research on social media use finds that this exposure measurably predicts “social media envy” and purchase intention. Comparison spending is not a metaphor, it is a documented pathway from feed to wallet. No neighborhood in history delivered that many highlight reels per hour.

The biases working against you, honestly sourced

None of these are character flaws unique to you. They are documented, replicated patterns in how human judgment works under normal conditions, which is exactly why marketing departments design around them on purpose.

What Scripture adds beneath the mechanism

Behavioral economics describes how the pull works. Scripture diagnoses why it never resolves. “He that loveth silver shall not be satisfied with silver” (Ecclesiastes 5:10, KJV). The Preacher named the hedonic treadmill long before it had a clinical name: the next purchase promises satisfaction and delivers only the next want. First John locates the categories precisely: “the lust of the flesh, and the lust of the eyes, and the pride of life” (1 John 2:16, KJV). Read this way, the lust of the eyes is comparison-driven wanting: desire triggered by seeing, not needing. The pride of life is status bought and displayed. Advertising and algorithmic feeds did not invent these appetites; they industrialized delivery to them.

Practical defenses

• A 24-hour rule on any non-essential purchase above a threshold you set. Present bias loses most of its power once “now” becomes “tomorrow.”
• An unsubscribe and unfollow audit, quarterly. Every retail email and every account that reliably triggers comparison is a manufactured cue; you can simply remove the cue.
• Name the anchor out loud before a sale: “what would I have paid for this yesterday, with no crossed-out number in view?”
• Ask what you’re actually buying: the item, or relief from a feeling the item did not create. This is Ecclesiastes 5:10’s question in modern clothing, and it is worth asking at the register, not after.

See contentment and simplicity for the fuller biblical case against the treadmill, and pair this lesson with automating the decisions you’ve already made in habits and automation. Crash Course’s behavioral economics episode is on the video shelf, linked and not embedded.

Try it yourself: open the interactive tool for this lesson.