Answer:
A future setting allows for a sharp contrast between present-day society and the future.
Step-by-step explanation:
Kurt Vonnegut's short story "Harrison Bergeron" tells a futuristic story of how equality is maintained by the society and government. The 'superior' and 'inferior' people are made to conform to the 'assumed' level of equality, making the better ones wear disguises to be on par with the others.
By writing this story about a society that is 120 years in the future, Vonnegut is setting a future which is in stark contrast between the present day society and the future that seems to be the possible future for humanity. This setting provides a perfect contrast to the present society, allowing for a simple yet powerful representation of the society of the future.