Outsourcing, offshoring, hiding money in the Caymans and elsewhere.
There are many explanations for this decline, including the impact of offshoring, globalization and technology.
The only thing that will stimulate is liberal and conservative opposition to what looks like a plan for offshoring.
the practice of moving business processes or services to another country, esp. overseas, to reduce costs
Transfer of a business process, e.g. manufacturing or customer service, from a company in one country to the same or another company in a different country. This overlaps partially with outsourcing, in which work is transferred to a different company in the same or a different country.