Jobs Minister Richard Bruton says the GSOC bugging affair "hasn't been good" for public confidence in the Gardai and the watchdog.
Mr Bruton says the independent inquiry into the suspected surveillance is important to bring "clarity".
"The truth here is the Government has always been determined to ensure there is full confidence in both the Gardai and the Garda Ombudsman's service.
"Over the last number of days, there has been new revelations or stories each day. That hasn't been good for confidence.
"The Government decided let's have a strong review, undertaken by a High Court judge, that can give people clarity. And I think that's really a collective decision of the Government and I think it's in the best interests of those two important institutions for our country," he said.
Mr Bruton says he independent inquiry is the "right course of action"
"The last week hasn't been good and I think it's important that those institutions, who are independent, the Garda Siochana Ombudsman Commission is independent and appointed by the Government.
"It is really important that we create the space where there can be clarity on these issues that has caused concern. That is why we are doing this and it's the right course in my view," he said.