It's a dream portfolio for India's politicians. And why not? The railway minister has at his command a budget of Rs 8,500 crore, a workforce of 16 lakh people, hundreds of contracts to award, and unending privileges to enjoy and please. Not for nothing did an unholy row erupt recently between Trinamool Congress leader Mamata Banerjee and Samata Party's Nitish Kumar for the portfolio. Let's examine the track record of some of our past ministers: