When countries like China focus on heavily investing, initially it works well because they invest in productive things and this grows their economy. However, later, they run out of that many productive things to invest in, in which case they are robbing their citizens of consumption and outcompeting other countries’ manufacturing, but not gaining much actual new productive benefits. This leads to debt.
Bilateral tariffs like Trump is doing don’t work. The U.S. has a huge deficit because it consumes more than it exports. A global tariff could work by making goods more expensive and incentivizing people to consume, now relatively cheaper, domestic products. Bilateral tariffs just mean Americans will import cheap goods from country C and D instead of the heavily tariffed countries A and B.
Getting foreigners to invest in the U.S. hurts the U.S.. The U.S. has plenty of capital to invest and doesn’t need more. Additional investment means driving up the dollar, making U.S. goods less competitive internationally, and hurting U.S. exports.
China has debt to support investment. The U.S. has debt to support consumption. The system is out of whack and needs adjustment.