There are several synonyms that can be used for the phrase "perception of affluence." Some alternatives include "illusion of wealth," "false appearance of prosperity," and "misconception of opulence." Other options include "imitation of luxury," "pretense of richness," and "semblance of abundance." These phrases all convey the idea of a perceived level of wealth or prosperity that may not necessarily reflect the true financial situation. They are useful in describing situations where people or things are judged based on outward appearances rather than a true understanding of their actual resources or capabilities.