We know, that it weakens the economy. Ant that is only, if you are lucky.
A weakened economy may recover itself. In time. But what about other effects? For instance: effects on social security. Effects on safety? Effects on peoples life. And I mean this in a life or death way of the word.
There are countries in Europe, where corruption does not only effect the economy, it very distinctly effects social security. If you are rich: do not worry one bit. You can always buy some sort of social security. If you are poor: be afraid! Be very afraid. Because you may not get any social security. Not, if you can not bribe anybody to give it to you. Not, if you can not pay the risen fees. So what do you do? Start a career as a beggar for tourists? Open a Trattoria? A Taverna? A Pub? An Icecream-Shop? Souvenir-Shop perhaps? Portable? If you are in Europe, that might work, provided you live in a country, that People visit a lot. So there would be a lot of tourists to buy the souvenirs you offer. Then you only have to worry where you get the souvenirs you offer. And where to sell them without a work-permit.
If on the other hand, you live in Westafrica, the disability to pay some bribe can cost you your life. On the other hand: so can the simple disinclination.
I have just read an article by Thomas Mättig in the Zeit-Magazine (online) in which he describes, that corruption of nigerian politicians causes the state not to be able to work on the military security. There are military-education-programs, have been before by the british, are offered by Germany. Unfortunately, they are apparently not coordinated. The Money given for these schoolings is not used for it, but does not even reach it.
But a strong military, that learns to respect human rights and works without killing the innocents, is needed very much.
So the effect of corruption in Nigeria is, that people get killed. For not paying bribe, for not believing "right" for whatever angers the people who have the wapons and wish to use them. Because of corruption, the military can not be reformed and learn to work FOR the people, not against.
Because the money goes to corrupt politicians, people there call the policeforce there: "Kill and go".
I am certainly seeing that from a very comfortable post. I am living in a state, where there cerainly is some corruption somewhere. But the effects are not as harsh. Corruption comes, where greed can grow. And greed grows, where there is a lot to win and where the worth of life is seen to be only in money. But seeing, that we have a very secure social system and very strict laws in Germany, the chances, that the police will go berserk and kill people, if the don't pay a bribe are a long way off. Or at least it seems to me to be though. Corruption in Germany. At least the sort of corruption that is detected, is mostly economical greed. So far, I have not found or even searched for political corruption in Germany, but somehow I do not think, that it is very big scale. Though politicians do not really get as much money as the money-moguls, they do have a good deal of security that they could loose. And there is the reputation to be considered.
So, not knowing much yet, I am living with the happy feeling, that german politicians are not very corrupt, at least if they have to fear the loss of securities and reputation. That does not make them better human beings, but at least they don't risk other peoples lifes. That's something.
And to end on a happier note (or some such thing): we can reinstate the inquisition, if they get too daring in corrupt undertakings - or start at all -
Now: I do not wish to hurt religious feelings. The REAL Inquisition was a very bad thing, no need to ay it really, everyone knows that.
What I mean is: if people had to really fear an inquisition even of the sort in the film, maybe they would think about other ways to get rich, that won't hurt other people.
One last admission: when I first saw this song in the film, I did not listen to the text at all. Most probably I didn't understand most of the text then. I just loved it for the melody. It is a fun melody. And at about 14 I did not much think about the pictures as well.
Let take this sort of inquisition as a way to make very corrupt people think twice or more - where needed - before they embark on corruption.