"The Chief Minister has hinted at starting online state lottery to mop up resources but this move is fraught with danger. We will oppose it," party spokesman Ganesh Dutt said.
The state lottery had ruined several homes and it was stopped due to pressure from the people, he said.
Even the state High Court had favoured scrapping of the lottery but the "government is bent on treading a ruinous path", the spokesman said.
Accusing the government of indulging in wasteful expenditure, he said instead of restoring prudent financial management, it was resorting to "unethical" practices like reintroduction of the lottery.