Because the federal government has only those powers granted to it by the Constitution.
Explanation:
The constitution is the body of documents where the functions and limits of the tiers and arms of government are spelled for regulation. Hence, all legislation of the government must conform with the constitutional authority for passing.
Hygiene factors- involves the presence or absence of job dissatisfiers, such as working conditions, pay, company policies, interpersonal relationships. When poor work is dissatisfying. Good does not motivate employees.