oops! Sorry. It’s a recent (well, compared to the original) parody/homage/whatever of the poem:

• This is just to say
• I have eaten
• the rich
• that were at
• the golf club
• and which
• you were probably
• saving
• for class war
• Forgive me
• they were delicious
• so white
• and so old

It was posted on Twitter by “your friend Helen” (@hels) many years back. I assume they were the author but I really don’t know.