They could just be against it because of the principle of the issue. People vote against their self interest and in favor of idealogies they believe in all the time
Said ideology is equally stupid.
Why?
Because unchecked wealth accumulation eventually leads to a social collapse like in 18th century france. Not to mention the fact that it is grossly unethical. I am all for people getting rewarded for their hard work, but there is a point at which it becomes ridiculous.
Socialist ---
"Oh, my mother; oh, my friends, ask the angels, will I ever see heaven again?" - Laura Marling