The tax liability law bans the adoption of normative acts raising public wages and pensions six months before elections.
After a 25% cut in public wages in 2010, public sector employees received a 15% pay increase last year.
Prime Minister Victor Ponta on Monday said public sector wages will be restored to their June 2010 level, with a first raise of 8% to be operated starting June 1 and the remainder up 15% to be granted in October or November.