The people who are given incentives are very poor and uninformed about the ways of politics. Ideally, they can either refuse the incentives or just get it and v

The people who are given incentives are very poor and uninformed about the ways of politics. Ideally, they can either refuse the incentives or just get it and vote the way they want. By human nature, they get a sense of obligation when they receive the incentives. They feel committed to vote for the party that provided the incentive. Even trying to convince them they don't have to, does not work. They feel the onus is on them to complete the "transaction" by casting the vote. That said, this is more of issue in by-elections, where there is only one or a handful of constituencies and the politicians can focus on them. When the election is state-wide or nation-wide, the major determining factor is still the popular sentiment towards the political parties in question (based on their track record in power, which of course is skewed by media).