Scenario: A household earning $74K reads budgeting advice built around a $1,000 monthly surplus.
Failure: They copy the tactic exactly, hit one unexpected cost, and stop after two weeks.
Consequence: They label the strategy โbad,โ even though the issue was mismatch between advice and cash-flow reality.
If your monthly surplus is under $250 โ start with expense-floor changes before aggressive targets.
If your monthly surplus is over $600 โ test faster acceleration, then keep only what survives a bad-month run.