The question essentially was: "is it as bad to give Rs 20 to a cop for `chai-paani' (a bribe) as to loot crores of rupees?" Indeed the two are not comparable in their impact on the nation. But if you're talking of impact, consider a different comparison. Economics not being a conservative system (in the physics sense) it is possible hypothetically for a person/government to loot crores and still deliver more to the country in terms of real benefits (health, employment, infrastructure, stable economy) than someone else who is scrupulously honest but -- out of either incompetence or apathy -- fails to carry out any development, thereby condemning the poor to a short and miserable life. So if the impact of corruption, rather than absolute morality, is the question, some of the crore-makers might have a defense. The question would become not: "did you loot crores?" but: "did you loot crores and still fail to deliver?". If you think about it, much of the buzz about the Commonwealth Games had this tone to it, since the organisers were perceived to be guilty of precisely the latter sin.
I'm deeply uncomfortable with such a morally relativist view, but I put it forward because it deserves discussion and because the poor have good reason to be less uncomfortable about it. In fact the upper and even middle class have the luxury to say "no corruption, even if that means no development" because that proportionately hurts them less than the most vulnerable sections.
If instead the discussion is about morality, then the monetary extent or impact of one's corruption does not matter so much. The question to determine the degree of corruption would now be on the lines of "if you are corrupt, did you actively seek to become so or did you merely give in to the opportunities for corruption available to you?". And here I believe most people actually do not seek to be corrupt, but at the same time most people who find themselves in a corrupt society tend to participate in the game without much reflection on rights and wrongs. A frighteningly large proportion of people I know (including young people) feel it's OK to fudge a travel claim or medical claim and pocket a few hundreds of rupees in cash. If the same people are put into a ministry, would they not pocket a few crores using the same philosophy?