We have to be realistic rather than living in a utopia that a poor country like Bangladesh can made least corrupt like Norway or Denmark overnight without becoming a generous and prosperous welfare country like them.They were not such least corrupt in all their history.Both emergence of a welfare state and decrease of corruption gone hand in hand for them. As I have said before, corruption gradually decreases with improvement of socio-economic indicators which takes a lot of time. how you can expect a Bangladeshi constable who earn just 100 dollar per month and live in a deprivation to show same restrain to bribe like a Norwegian police who get 5000 dollar salary per month and a lot of social safety benefit from govt.? this is just one example.
All the developing countries who are marching towards prosperity are doing that despite high level of corruption. Even when Bangladesh was most corrupt country in the world in TI report in 5 consecutive year in 2001-2005, it's GDP still grown at healthy 5-6 percent per year, literacy increased, some development works were done.It was not the doomsday for Bangladesh.Bangladesh recover from that.If we want to believe in your theory, than Bangladesh should not have recovered from that 'most corrupt' tag rather should gone into oblivion.We have to fight corruption and try to improve transparency, no dispute about that, but we also have to be realistic about how much corruption free we can become in current condition.Just because we are among the most corrupt country in the world, does not mean we have no hope of development or we should put a mask of permanent pessimism.
Show me any example of a poor country where corruption died out or at first got corruption free and then experienced economic development? You are getting it completely wrong.For reduction of corruption, strong institutions are required as well as forceful implementation of rule of law, both of which are dependent on socio-economic progress. Moreover, there is no absolute corruption free country in the world, even Norway is least corrupt, not corruption free or corruption died out there.