That preparations against zombie attacks should be the responsibility of the military

The United States military employs around 1 Million personnel, spends approximately $500 Billion every year to protect its citizens and boundaries. Many a nations have tried to take down this superpower, with weaponry as well as armed forces, but have been thwarted by the ever powerful US military. Situations that require complete execution are generally performed well by the military, and that doesn't even just apply to this country's military. They just happen to consist of the strongest, bravest and some of the most skillful men and women in the country they represent. Furthermore, the financial backing an army has creates scope for brilliant advances in Weapons. A military is, by far, the most readily equipped team of fighters there is, and in affairs such as an Apocalypse, would be the optimal muscle to handle it. 

The governments of all the great powers in the world should come together, and form a referendum. A referendum that should uphold human life above all else. In the case of a Zombie Apocalypse, any and all beefs between countries should be dropped and resources should allocated towards reducing human annihilation. And as for the actual conflict, the able people of the military shall be prepped and allowed to take down these nasty beasts and save the average Joe and Jane from being eaten up like uncooked steak.