Is the UK No Longer Democratic?

OK this seems absurd, asking if the UK is democratic but bear with me and decide for yourself.

1. Tony Blair committed UK to war in Iraq on his word alone.
2. David Cameron has committed the UK to a £11 billion overseas aid package on his say so alone.
3. Gordon Brown destroyed pensions by raiding the private sector pension pot on his say so. The private sector has been targeted as a result as their pensions looked strangely one-sided.
4. Cameron increased student fees from £3k to £9k.
5. Frank Dobson based on his says so doubled/tripled the cost of the NHS based on his "advice"/management, seemingly ignoring any advice.

Were any of these voted on? I can go on.

Nearly every pledge has been dropped over the last 20-30 years. We vote the government in based on their manifesto, which they simply drop when it suits them. So where is the democracy? We vote and are ignored time and time again.

Are we stupid?.