Relative poverty and enforcement: if a cop accepts a bribe they can lose their job. It’s not worth accepting £20 (or even £2000) bribe and forfeit larger future earnings.
So when bribes do happen it’s for much greater amounts (or nebulous, hard-to-trace things like favours), which rules out bribes for minor infractions.
My question is, how do you "prove" this.
We have cases in India where someone was held to not having been commited a crime 30 years after being first caught taking few bucks.
They lost their life, earnings, social status and in the end a judge says "you are free to go" but there is no compensation. https://www.news18.com/india/declared-innocent-after-30-year...
Or this case
https://indian.community/news/delhi-high-court-upholds-convi...
But it doesn't mean corruption isn't caught or people don't care. They do, it's just people get away with a lot of things