Although I sympathize with the sentiment with which you have written this (I also wanted the government to fall), I disagree with the suggestion. The vote is always an individual choice. A party can not have a say for the vote. The particular individual is supposed to act on his own conscience. So why do we have a party whip? Its a mechanism devised by the collective wisdom of our lawmakers to curb horse-trading. In the absence of whip, there is a tendency for horse-trading. Our MPs unfortunately misuse the most important tool given to them by the people who elected them, by trading it for money, ministry and all other spoils.
In other words, whip says that look - you got elected on our party's ideology. You can't defy our ideology and still continue to be our member. You are free to cast your vote any which way or infact not cast your vote at all. But there is a consequence to your act - relinquish the seat you got in Lok Sabha, fighting on our party's ticket. Dare to go back to the people as an Independant or on other party's ticket. If the people are convinced that you voted, keeping their interest in mind, they will reelect you else they will kick you at the right place.