American consumers are reshaping the retail and service landscape by trading up to higher-quality offerings they can afford, driving profits for companies like Walmart and United Airlines while punishing budget-focused competitors such as Spirit Airlines and Dollar General. This shift reflects a fundamental transformation in consumer behavior that challenges the prevailing "K-shaped" economic narrative and reveals a more nuanced story of upward mobility and strategic spending.
The upper-middle class grew from 10% of families in 1979 to 31% in 2024, according to recent research from the American Enterprise Institute. A family of three earning $133,000 to $400,000 per year was defined as upper-middle class. This group's share of income also doubled over the same period. Scott Winship, a senior fellow at the American Enterprise Institute and co-author of the study, said, "The whole distribution has moved up." He added, "It undercuts the idea that there's hollowing out of the middle class."
The Premium Economy Phenomenon
More Americans have left the cramped, no-frills service of life in basic economy and moved up to premium class. They can afford nicer flights, better groceries and fancier experiences, but cannot reach the high-touch, hot towel service of home ownership and retirement in the next class. Despite a growing chunk of people entering the ranks of the upper middle class and even becoming millionaires, they feel like they're falling behind because owning a home has drifted out of reach and retiring like the Baby Boomers seems to be in jeopardy.
Nearly 40% of Americans do not own their home, so they missed out on soaring home values after the pandemic. Home prices have since ballooned to five times the average median income, trapping people in place. The new members of the upper-middle class are redirecting their higher wages to spending on the products and services they can afford. Travel, concerts and other fun activities have replaced home ownership in the "premium economy" economy.
Market Winners and Losers
This shift has punished companies competing entirely on price, such as Spirit Airlines and Dollar General, while lifting the likes of Walmart and United Airlines that consumers perceive as higher quality. Last year, Delta and United accounted for more than 90% of the airline industry's profits. Spirit Airlines shut down its operations in part because many of its customers grew willing to pay $30 or $40 more for a little extra legroom, free snacks and better service at larger carriers like United and Delta.
Walmart has also peeled off lower-income customers from competitors like Dollar General. The two retailers share customers and have thousands of stores located close to one other. But Walmart has upgraded in recent years — cleaning up stores, sharpening prices and adding speedy curbside pickup and home delivery — and this strategy helped it grab market share from Dollar General.
Simeon Siegel, a retail analyst at Guggenheim Partners, said, "People have been waiting to call the death of consumer, but the consumer is still spending." He added, "It's much easier to label everything as a K-shaped economy."
Sustained Consumer Strength
Retail sales have climbed for three consecutive months, bolstered by a healthy labor market and higher tax refunds. Ameriprise Financial chief market strategist Anthony Saglimbene said in a note to clients last week, "The consumer is still spending and working." He added, "If inflation pressures ease at some point, the 'K-shape' in the economy could begin to flatten."
This summer's travel season is expected to surpass the last two, according to a recent Bank of America survey, and only roughly 10% of survey respondents are considering canceling their trip over high gas prices. Hilton expects its "premium economy" hotel brands such as Spark by Hilton to grow in the coming years. Hilton CEO Chris Nassetta recently predicted the U.S. economy will enter a "C-shaped" phase in the next few years, where consumer spending is more evenly balanced across income levels. Lower inflation and interest rates and AI investments will eventually help low and middle-income consumers gain spending power and flatten the K-shape, he said. "You are going to see this convergence."
Meanwhile, the proportion of families classified as poor and lower-middle class also fell over the past five decades. The war in Iran is making it worse by squeezing low-income households that spend the largest portion of their income on gas and necessities.
Why This Matters:
The data revealing substantial growth in the upper-middle class from 10% to 31% of families demonstrates that market-driven economic mobility remains robust despite popular narratives of stagnation. Companies that have invested in operational efficiency, customer service improvements, and value delivery—like Walmart and major airlines—are capturing market share through competitive excellence rather than government intervention. The consumer spending strength reflected in three consecutive months of retail sales growth and strong travel demand indicates that private sector innovation and competition are effectively meeting evolving consumer preferences. However, the housing affordability crisis, with prices reaching five times median income, suggests regulatory barriers and supply constraints may be limiting wealth-building opportunities for upwardly mobile families who are otherwise thriving in the marketplace.