It is Congress and then Mahatma Gandhi who started mass movement of Independence. Other movements started after taking inspiration from Congress. Ther is no doubt about that majority of educted people doing service & helping to British rule.
Post independence corrupt oeople started joining congress as it was ruling party. Ther congress has lost its efficiency and vote share to regeonal parties like DMK, TDP and religeonal-Castist parties like BJP, Akali, SP, BSP. But with pwer these parties have become more corrupt that congress. That is why Congress came back in the power again.
Regardin Nehru India is going to become super power because of him only. He satrted all IIT'S, IIM's. BARC,ISRO, NCL like institutes and constructed dams .