Lifestyle Creep
Where did the pay rise go?
The idea
Spending tends to expand to match income, so a rise can leave the gap between earning and saving unchanged.
In the real world
A significant pay rise that produces no change in the amount saved.
Going deeper
Spending expands to match income through a series of individually reasonable upgrades, each of which becomes the new baseline immediately. Because no single decision looks like overspending, there is nothing obvious to correct.
The ratchet is in the absence of a decision rather than in any purchase. Income arrives, spending absorbs it, and the savings rate is whatever happens to be left. Deciding where the next increase goes before it arrives converts a default into a choice, and it is much easier to allocate money you have not yet grown used to having.
Where it stops applying
Some lifestyle improvement is the entire point of earning more, and treating all increased spending as a failure is joyless. The concern is drift, not deliberate spending.
Why it matters
It explains why higher earners are often no closer to security than they were before.
Try this today
Decide where the next rise goes before it arrives.
Test yourself
Someone's income rises 40% over five years and their savings rate is identical. Nothing was wasted; each upgrade was reasonable. What happened?
Show the answer
Each increase was absorbed as it arrived, and the new level became the baseline immediately. Because no single decision looks like overspending, there is nothing obvious to correct — the ratchet is in the absence of a decision, not in any one purchase.
Learn this in the feed Answering from memory, then again days later, is what makes it stick.