it still protects against extreme runaway government power There are no meaningful checks on the surveillance powers of GCHQ, it has broken the law with impuni

it still protects against extreme runaway government power There are no meaningful checks on the surveillance powers of GCHQ, it has broken the law with impunity, and surveils the very people supposed to keep it in check. While I agree the UK is still democratic (for what that's worth), I think you'd find it hard to prove that people want terrorism laws to be misused or extended, but they are certainly indifferent to it unless it affects them clearly and directly. The population did not vote for dragnet surveillance or draconian terrorism laws, because they never had a choice - both major parties have proposed and passed draconian counter-terrorism laws, and misused them for other ends and on people who are clearly not terrorists. So you're incorrect in stating that voters demanded this.