Final answer:
XYZ Country's government is most likely following the theory of Mercantilism, which advocates for government regulation of the economy to maximize wealth and increase the net amount of currency that stays in the country.
Step-by-step explanation:
XYZ Country's government is most likely following the theory of Mercantilism. Mercantilism is a theory of international trade that advocates for government regulation of the economy to maximize wealth and increase the net amount of currency that stays in the country. XYZ Country's government encourages domestic production and exports, while imposing high tariffs on imported goods to protect domestic industries and promote self-sufficiency.