In this thread's context, the "constitution" is the kind of thing which is supposed to make that not happen.
Famously bereft of a written constitution, the closest single document along these lines which the UK had for a long time was ("the") Magna Carta, which basically exists because King John's lords were tired of King John directing the courts that King John personally owned to not hear cases against himself.
But if your point is that some constitutions may as well be toilet paper for how much the people with power care about their contents, then I agree.
Famously, the toilet paper known as the US Constitution has prevented any violations of rights recently, like the brown skinned people getting brought to concentration camps, or your dog getting shot because you used free speech.
Famously bereft of a written constitution, the closest single document along these lines which the UK had for a long time was ("the") Magna Carta, which basically exists because King John's lords were tired of King John directing the courts that King John personally owned to not hear cases against himself.
But if your point is that some constitutions may as well be toilet paper for how much the people with power care about their contents, then I agree.