Most of the systems that countries depend on rely on our engaging with them. The police are a good case in point here. There are generally not enough police in most countries to apply law by force, and if people don’t consent to be policed, they stop being effective. People who consider the police to be fair and reasonable will consent to being policed. When people think their police are corrupt, unjust and unreasonable, they won’t cooperate.
The same can be said of tax systems, border control, customs and excise duties, benefits systems and so forth. Give people a fair system and the vast majority of people will deal fairly with it, will self-report fairly, and so forth. Give people a corrupt or unfair system, and many more people will be inclined, or obliged to try and cheat it.
If the system appears to be unfair, cheating it can feel like justice. If you can’t trust the system to treat you fairly, there’s no incentive to cooperate with it and every reason to try and fudge things so that you get what you need. Why should I pay my tiny amount of taxes (this is a rhetorical question) when big companies who owe millions, don’t?
However, it’s noticeable at the moment than many systems in the UK are skewed towards trying to catch out what had been a tiny minority of cheats, and do so at the expense of fairness to the majority. By this means, many more people are moved towards not co-operating, and as a consequence the whole thing becomes ever more corrupt. Our benefits system pushes people to the edge and over it all the time. Survival depends on playing the system, taking cash in hand work, and for some people, theft. Given the beliefs and attitudes of our current government, a punishment-orientated, ever less fair system is likely to result from this.
Treat people as though they are good, decent and likely to do the right thing, and the vast majority of us will. Treat people as though they are suspect, make it hard for them to sort out what they need, and you give them little choice but to cheat you in order to get by.