I meant audiences would be less likely to sympathise, not that they wouldn't. Plenty of excellent, popular Shakespeare plays focus on the wealthy, and even monarchs.
In the folklore of old, very often the hero had immense wealth and power. Be they a knight, or even King Arthur himself. The successful have slowly become more hated over time, largely due to tedious liberal agenda and an absurd fetishisation of the working class. Being poor in fiction is seen as a virtue by modern critical thinking.