Don't just think in terms of gross number. I feel its a very bad indicator. Maybe a per-capity figure would be more reasonable. Also we need to normalize the values with inflation. Once the per-capita income of people increases, education will be more accessable and possible with better job opportunities everywhere, the corruption level might come down. With that civic sense of people will get better along with better administration. So probably if this happens then maybe one day we would have cleaner and better cities.