At least, it hasn't worked for decade after decade after decade.
But it has worked for decade after decade after decade. It doesn't work perefectly but it still works.
And so we are back to the beginning. What to do about the proliferation of WMD (especially among unstable regimes) -- the fundamental question that started this debate, and a question you have yet to answer.
My answer is simple: Let them kill eachother.
Name one rogue WMD State whose primary enemy is the USA. North Korea? They hate South Korea. Pakistan? They hate India. Iraq? They hate Iran.
And this is the situation even with US Troops overseas. Without US troops in the region, the fanatics are delighted to kill the "infidel" next door. And not, ahem.... us.
For whom has it worked? For the elites in power who derive the benefits from being close to those in power and therefore lucrative business contracts? Or perhaps the multinational corporations that get their bacon pulled out of the fire at taxpayer expense?
Or maybe the 250 dead soldiers in Lebanon was what you were talking about? That worked too eh? Perhaps you meant the hundreds of dead in the embassy bombings. More examples of the practice working?
Oh I know....it's the 500,000 dead in Iraq. That worked. Though I doubt if you'd find many Iraqi's who'd share your almost religious belief in how well everything is "working."