1 Bankers.
2 Accountants
3 Lawyers.
I do hate them but they are a necessary evil.

Joking
1 Long Term Unemployed who don't look for work, social parasites.
2 Smokers for the burden they place on health systems around the world.
3 Any type of religious leaders, as religion is a scam. weak minded people need something to believe in, they cash in, simple.