LOL, nah! The Quad thing is a stupid idea!
First of all, Japan and Australia are already US allies/servants. What realistic need is there to put them in a so-called Quad? It's not as if they weren't US allies/servants before. Some might argue that "they need to strengthen bilateral defense ties". Sure, but for what? For Containing China? That's laughable, bilateral ties are insignificant for the purpose of containing China. If containing China is their main purpose, they would need first and foremost the close and intimate leadership of the USA. This Asian NATO business sounds like a joke because what determines its effectiveness for its ultimate purpose is the level of involvement of the USA, NOT how closely the other parties (small potatoes) work together.
Secondly, China is a continental power. It will, as a form of civilization, have a large and powerful army, despite whether or not this army even have a realistic potential opponent. And don't dream about turning the multi-military men strong PLA into a oversized marine/expeditionary force, that's fiscally impossible, nor desirable. After the fall of the Soviet Union, Chinese Army (PLAGF) strategically lost the importance it once had, because it lost one of its main purpose/enemy. Yet as a result of Continental Power tradition, the PLAGF will still live on and keep on developing, gobbling up resource to build strength that is not going to be used in any meaningful way. While the main potential opponent of the PLA, the US forces and her allies, are all maritime powers. They don't need to put that much resources in the army. So things were not in China's favor, in terms of optimal use of resources. UNTIL THE IDIOTIC US ADMINISTRATION AND HER ALLIES HAD THE STUPIDITY TO DRAG INDIA INTO THE MIDST.
哈哈哈哈哈, to me, this is the biggest blunder of the century. Some idiotic fat CIA spy head thought that he is smarter than Kissinger Brzezinski. You see, alliance is a double edge sword. An ally could be both your asset or your liability. In the case of India. India already issue with China, the US doesn't need to persuade India to join some king of alliance to build the Indian's animosity towards China. As for the US, Japan, and Australia, all three are effectively outlier island on the outskirt of Eurasia, they only need the navy for their containment strategy. PLAGF was redundant and meaningless in countering the US, Japan and Australia, because they are islands.. Now that India is in a Quad, the PLAGF will all of a sudden be greatly useful in countering the US, Japan and Australia (plus India), because the other three party of the Quad will have an obligation to protect India. This means that the US, Japan and Australia will start diverting resources from Navy to Army, if in case China started a land war with India. This is effectively given the control of the matter to China.
Making a Quad does NOT make the US any more or less involved. But it sounds like the US want to eventually back out of this and let the other three carry the weight of containing China.