Are the Indian poor people voters soft target for voting?

75% to 90% of the Indian people are very poor and I think soft targets. When you give Rs.100 or Rs.500 they do as it is for the people. Voting is done this way. Hence, whoever gives lots of free money or material things will only win all elections. But cash for vote is against the rules of the election commission. How to control SEVENTY FIVE CRORE people against this SCAM? Are the Indian poor people soft target for voting scam? How to control seventy five crore people against this HUGE SCAM?