Political lobbying / rent seeking from special interests
Election cycles are too short for there to be much incentive for politicians to address long term problems.
Bold leadership is pointless if it gets you voted out of office
Politicians like to compromise, but physical systems do not compromise.
Goals and timetables are little more than a way for politicians to deflect public demands for climate action. For example, Germany is about to miss its [target?] “by a mile”.
Governments often fail, for reasons explained here:
Next: Organisational Problems