At the time of his resignation, he was chair of the Subcommittee on Fiscal Imbalance and is the Bloc's Finance critic.
He has also in the past been the critic of Western Economic Diversification, International Financial Institutions, Indian Affairs and Northern Development, Intergovernmental Affairs, and Public Safety and Emergency Preparedness.
On September 8, 2006 Loubier announced that he would not seek re-election at the next federal election but will remain a militant for the sovereignty of Quebec.