At last, I found out something.

This is from Nassim Nicholas Taleb's (Does anyone over there know if Taleb means 'student' in Arabic?)

106- On Killing Oneself

Thierry de la Villehuchet --an acquaintance of mine -- just killed himself in the aftereffects of the Madoff case. He had dragged his clients into investing with Madoff . "Killing himself over money?" I kept hearing. No, it is not about the money --it was other people's money. It is about dignity. I could not help comparing it to Madoff, pictured walking around Manhattan with a faint smirk --totally insensitive to the harm he caused.

This is an aristocratic act coming from an aristocratic character: you take your own life when you believe that you failed somewhere -- and the solution is to inflict the ultimate penalty on yourself. It is not the money; but the embarrassment, the shame, the guilt that are hard to bear. Someone callous, indifferent to the harm done to others would have lived comfortably ("it is all about money"). A life of shame is not worth living. Christianity never allowed suicide; the stoics did --it allows a man to get the last word with fate.

Thierry, veuillez recevoir l'expression de mon respect le plus profond.

And here it is what I mean to be an answer, from Steve Pinker's

...dignity is relative. One doesn't have to be a scientific or moral relativist to notice that ascriptions of dignity vary radically with the time, place, and beholder. In olden days, a glimpse of stocking was looked on as something shocking. We chuckle at the photographs of Victorians in starched collars and wool suits hiking in the woods on a sweltering day, or at the Brahmins and patriarchs of countless societies who consider it beneath their dignity to pick up a dish or play with a child. Thorstein Veblen wrote of a French king who considered it beneath his dignity to move his throne back from the fireplace, and one night roasted to death when his attendant failed to show up. Kass finds other people licking an ice-cream cone to be shamefully undignified; I have no problem with it.

Second, dignity is fungible. The Council and Vatican treat dignity as a sacred value, never to be compromised. In fact, every one of us voluntarily and repeatedly relinquishes dignity for other goods in life. Getting out of a small car is undignified. Having sex is undignified. Doffing your belt and spread- eagling to allow a security guard to slide a wand up your crotch is undignified. Most pointedly, modern medicine is a gantlet of indignities. Most readers of this article have undergone a pelvic or rectal examination, and many have had the pleasure of a colonoscopy as well. We repeatedly vote with our feet (and other body parts) that dignity is a trivial value, well worth trading off for life, health, and safety.

Third, dignity can be harmful. In her comments on the Dignity volume, Jean Bethke Elshtain rhetorically asked, "Has anything good ever come from denying or constricting human dignity?" The answer is an emphatic "yes." Every sashed and be-medaled despot reviewing his troops from a lofty platform seeks to command respect through ostentatious displays of dignity. Political and religious repressions are often rationalized as a defense of the dignity of a state, leader, or creed: Just think of the Salman Rushdie fatwa, the Danish cartoon riots, or the British schoolteacher in Sudan who faced flogging and a lynch mob because her class named a teddy bear Mohammed. Indeed, totalitarianism is often the imposition of a leader's conception of dignity on a population, such as the identical uniforms in Maoist China or the burqas of the Taliban.