False flags, although risky, are probably the cheapest way to create an atmosphere conducive to change. Was the Parliament shooting a false flag? Who knows. The bottom line is govs seem to have repressive legislation sitting around to push whenever bad things happen. My guess is the West's governments anticipate unrest as a long-term consequence of economic globalization and they want to consolidate power in advance.
The bigger loss is that even if we think a false flag operation to be extremely unlikely, we no longer rate it as impossible. Then again, anyone who was rating them as impossible pre-Snowden hadn't been paying attention to history.
Hey, it's a plausible theory...