Take a plain case. Someone says they live with their sister in an expensive city, where the floor’s housing and mobility parts are high, while they actually live in a cheap rural county. Each month they collect the difference. No one is harmed in a way they can see, the gain is real, and the lie is easy to tell.
Every system that pays people will meet cases like this. The question is not whether people will cheat. It is what kind of system makes cheating rare, small, and caught, without turning the floor into a checkpoint.
Five principles
1. Fraud follows conditions. Most cheating in today’s benefit systems feeds on their conditions: tests of income, rules about who lives with whom, proof of searching for work. Each condition is something to lie about. The floor removes most of them. Every adult receives the single-adult rate whoever they live with, so pretending to live apart gains nothing. There is no income test, so hiding earnings gains nothing. There is no work search, so faking one gains nothing.
2. Keep the gain small. What remains to lie about is where a person lives, because housing and mobility are priced by region. The regions are coarse, so most moves change nothing. Mobility is indexed as well as housing, which narrows the gap between city and country, since a car-dependent county costs more to move around in.
3. Check records that already exist. A claim is compared only with records kept for other reasons: where a person rents or owns, where their children are enrolled, where they get healthcare. Ordinary people are not watched to catch small lies. A review starts only when those records point somewhere cheaper and the gap is large, the logic of the verification tradeoff: checking that costs more than it saves is waste. Every fraud and reporting rule names the records it uses; nothing new is collected to enforce it, and the measuring bodies report in public on whether that holds.
4. Consequences fall on the gain, never the floor. A false claim is corrected from then on, which is not a cut: moving someone to the region they really live in is simply the right amount. The overpayment is repaid from income above the floor, without interest, and waits until there is such income. The floor itself is never seized or reduced, because a floor that can be taken away as punishment is no longer a floor.
5. Scrutiny grows with power. One person’s false address costs little. A firm hiding revenue, an official steering a contract, or a body bending a measure can cost millions and corrupt the system itself. Duty of care scales with power, and so does audit. When the protections themselves are used against their purpose, see when protections are turned around.
The case of the sister
The regional uplift, the amount above the cheapest region’s rate, is paid only against evidence of housing in that region: a lease, ownership, or a declaration by the person hosting them. A host who declares that someone lives with them shares responsibility for repaying a false claim. Someone who really lives with their sister gets the city’s rate, and may well be paying her. Someone who does not now needs their sister to put her name to the lie. The base floor needs no evidence at all.
Fraud of every kind
| Kind | Example | How the framework answers |
|---|---|---|
| Residence | claiming an expensive region while living in a cheap one | records check; housing evidence for the regional uplift; correction from then on |
| Household | pretending to live apart for two payments | removed: every adult receives the single-adult rate |
| Identity | duplicate or invented people | one credit per person, tied to legal identity, which is a pooled good |
| Children | claiming a child one does not raise | the child’s credit goes to whoever raises the child, settled by school and health records |
| Need | faked disability or care | the one part of the floor that is verified |
| Firms | hiding revenue, booking it elsewhere | the public share attached to inputs and market access; audit scaled to size |
| Commission funds | invented care hours, sham projects | the people the work serves decide and can see; ordinary audit |
| Officials | bribes, favors, steered awards | when favors are for sale: void, repay, bar |
| Measurement | bending the floor measure | several independent bodies and the median rule, with every estimate published |
| Scarce goods | straw buyers, sham gifts to escape the allowance | trusts and companies looked through to the people behind them; credit limits bind the real buyer (who holds what is scarce) |
| Provenance | passing machine work off as human | disclosure standards, verifiable authorship, and penalties (signal provenance) |
What stays to be worked out
This is a start, meant to be refined as the model is tested. Four questions remain open: how identity is kept unique without becoming a tracking system, how disputes over who raises a child are settled quickly, how commission funds are audited without burying caregivers in paperwork, and how large a gap should trigger a residence review.
The aim throughout is the same. Make telling the truth the easy path, make lies small, and spend scrutiny where the damage would be largest.