How does the 16th Amendment promote justice and/
or make social improvements in society?

The answer is below

Explanation:

The 16th Amendment ensures the law allowed the United States federal government to levy income tax on all eligible citizens.

Therefore, such money is derived and is used to promote justice and

or make social improvements in society. This is done by establishing and maintaining government responsibilities such as army, roads and bridges, enforcement of laws, and similarly other important job duties

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.