Perplexity AI CEO and founder Aravind Srinivas said on Friday that the startup's Comet browser can boost productivity so that companies won't need extra employees. "Instead of hiring one more person on your team, you could just use Comet to supplement all the work that you're doing," Srinivas told CNBC's "Squawk Box." AI is already being deployed across businesses to save headcount and make operations more efficient, but the labor impact has so far been "limited," according to Goldman Sachs chief U.S. economist Jan Hatzius. Srinivas estimated that the value of "human digital knowledge work" contributes around $25 trillion to the gross domestic product, so a 20% gain in productivity could easily amount to $5 trillion in GDP growth. Chicago Federal Reserve President Austan Goolsbee agreed with Srinivas that AI could be a boon to the overall GDP if it can raise productivity growth and service, but cautioned about massive AI infrastructure spending.