Jamie Dimon speaking at the 2017 Delivering Alpha conference in New York on Sept. 12, 2017.

Optimism abounds in the most recent measure of how CEOs view the economy, according to the Business Roundtable.

Despite the cheery outlook, more business leaders now see labor as the greatest cost facing their companies.

This is the first time in 24 quarters that CEOs identified labor costs, rather than regulation, as the No. 1 burden. CNBC's Kayla Tausche reported that chief executives expect sales to increase as a part of the growing economy but that they plan to simultaneously hire fewer workers.

@kaylatausche: CEOs also say they plan to hire fewer people in the next six months, despite expecting sales to increase.

The labor market is near full employment, with the jobless rate most recently at a 17-year low of 4.1 percent, according to the Labor Department.