Party leader Abhisit Vejjajiva said the motion could start as soon as the Democrats got the official backing of 120 MPs.
“We have prepared all the documents as to why all Cabinet members should be impeached,” he said.
The Cabinet this week approved the choices of the Water and Flood Management Commission of contractors to undertake the expensive projects. According to Abhisit, the Cabinet has violated both the Constitution’s stipulation about public participation and the law against collusion on public contract tendering.
The opposition leader urged people to exercise their rights to prevent damage from the Cabinet’s move.
The water-management and flood-prevention project will be financed by massive loans.