As you mentioned, I think the biggest problem with this agreement is to exacerbate the imbalance between developed and developing countries.

As you mentioned, the iPhone is manufactured in China or India, and the cost is only $25, and the tax to be paid is 0.3 cents. The Irish company bought the iPhone and paid $1 in taxes. In the end, the iPhone was sold in Germany at a tax rate of approximately $20.

Obviously, the developed countries get more profits, while the manufacturing-based developing countries can only get a small return. I think it will also accentuate the inequalities between rich and poor countries. And 60% of the minimum tax revenue will be reaped by G7 countries. Developing countries, which represent more than a third of the world's population, are expected to receive only 3% of the revenue. (Data quote from Parrinello）