A large increase in imports is simply due to a low savings rate - this is the sectoral balances identity: the fiscal balance + household savings minus business investment is equal to imports minus exports. The U.S. has a low savings rate because it is so wealthy and has been so stable and wealthy for a century, so white collar U.S. professionals don’t need any precautionary savings. They save for retirement in 401(k)s to fund the next generation of U.S. technological hegemony and economic growth (see for example, Nvidia having a 770% Y/Y increase in profit, funded by stock sales to pay for R&D,
) but have some liquidity in transaction accounts necessary for day-to-day expenses but can otherwise splurge on meals out, vacations, sports games, electronics, and anything else their heart desires. Their employment is near infinitely stable (
) and any risk they may be unable to work due to health issues are covered by the efficient well-developed US financial sector (through life and disability insurance), which is uniquely capable of risk pooling and risk transfer for US households, made possible by well-crafted legislation such as ERISA and the SEC Act. It is this rational complete lack of precautionary savings that is causal to the U.S. current account/trade deficit and nothing else.