The Welsh Government has been accused of "underhandedly" pressing for snooping powers as part of the latest devolution settlement.
Monmouth MP David Davies reacted angrily to claims that officials in Cardiff Bay are seeking the right for full legislative control of surveillance activity and called for a detailed explanation of what the Assembly is doing.
"When the Welsh Assembly was set up, we were inundated with propaganda leaflets showing shiny new hospitals and schools," he said.
"There was no mention of spying headquarters.
"I am very worried about the ad-hoc way powers are being handed out. Policing could be next, which in itself would be criminal given the mess the Assembly have made of running health and education.
"NHS patients in Wales wait longer for treatment and diagnosis than patients in England for most of the main categories, there is no cancer drugs fund in Wales, while Pisa has ranked Wales' education the worst in the UK.
"And who can forget Education Minister Huw Lewis' infamous apology to young people in Wales for falling school standards?
"Now the Assembly are seeking wide-ranging surveillance powers to snoop into every corner of our lives. The fact they have gone about it in such an underhand fashion is extremely concerning."
As chair of the Welsh Affairs Committee, Mr Davies said he would now be trying to find out what forms of surveillance the Assembly want to be able to undertake, against whom and for what purposes.
"Are they going to be able to spy on people, tap our telephones or read internet records?" he added.
"It all seems very secretive and I think it's only right that questions are asked about the circumstances under which such powers are granted."
The current draft Wales Bill contains more than 260 powers which the UK Government wants to reserve to Westminster.
A revised draft Wales Bill is expected to be published within weeks.