Final answer:
The federal government is justified in building a mint through the necessary and proper clause of the Constitution. The power to coin money and regulate its value falls under Congress's enumerated powers. Additionally, the mint serves to promote national integration and unity, in line with the Constitution's objectives.
Step-by-step explanation:
In Article I, Section 8 of the United States Constitution, the enumerated powers of Congress are listed. While the power to build a mint is not specifically mentioned, it falls under the necessary and proper clause, also known as the elastic clause, found in Article I, Section 8, Clause 18. This clause grants Congress the authority to make all laws necessary and proper to carry out its other enumerated powers.
By creating a mint, the federal government is able to exercise its power to coin money and regulate the value thereof, as stated in Section 8, Clause 5. The purpose of the mint is to produce and distribute currency, which is essential for the functioning of the national economy.
Furthermore, the federal government can justify building a mint based on the principles of national integration and unity, as expressed in the Constitution. The power to promote the general welfare of the populace and protect property rights, among other responsibilities, are vested in the federal government. Therefore, the establishment of a mint aligns with these broader constitutional objectives.