US companies are facing a "new era" in which fewer people are entering the workforce and pressure to pay higher salaries may become permanent, Microsoft's President Brad Smith told Reuters in an interview.

At the software maker's Redmond, Washington, headquarters, Smith highlighted one source of what he called today's "greater economic turbulence." In his office, he walked over to a wall-sized touchscreen device and pulled up a series of charts, showing how population growth has tumbled in the United States, Europe, China and Japan.

"That helps explain part of why you can have low growth and a labor shortage at the height at the same time. There just aren't as many people entering the workforce," said Smith, who oversees the nearly $2 trillion company selling cloud-computing services to major businesses.

Government stimulus during the pandemic, COVID-19 concerns, childcare and other factors have contributed to the current labour shortage as well.

Executives including Mark Zuckerberg, chief executive of Facebook parent Meta, have recently fretted about the economy. Zuckerberg warned the United States might face "one of the worst downturns that we've seen in recent history," though Smith said it would be premature to declare a recession inevitable.

Competing for limited workers, Microsoft recently boosted pay at the same time as it slowed hiring, company officials said. The software maker also trimmed a small percentage of jobs pegged to the start of its new fiscal year.

Smith said Microsoft's business selling productivity tools, cloud services, and technology with artificial intelligence, which enterprises may need in a downturn, sets it up to weather economic challenges.

US Department of Labor data from June showed employers broadly had continued to raise wages and hire more workers than expected. Labor force participation, however, shrank for the second time in three months, to 62.2 percent, showing no persistent improvement since the start of 2022.

Population growth has become a hot topic in the tech industry, with Tesla CEO Elon Musk saying birth rates are too low to sustain the United States.

Musk recently fathered twins, making him the parent of nine children, Insider reported this month.

Smith said he concurred with Musk "maybe in the problem. I'm not recommending the same solution." © Reuters