Irony in Wealthy Heights' Gratitude Ceremony

Read the following excerpt from a satirical novel:

"In the Wealthy Heights suburb, where every lawn was manicured to perfection, the residents held their weekly 'Gratitude Ceremony.' Each neighbor took turns expressing thanks for their vast fortunes, while the local food bank was humorously referred to as a 'pop-up gourmet experience' for those less fortunate. During the latest ceremony, Mrs. Pendleton stood up to state, 'I am endlessly grateful for the ability to choose between ten different yachts for my Caribbean vacation!'

How does the author employ irony in this excerpt to enhance its satirical effect?