By ALEXANDRA OLSON 

AP Business Writer

NEW YORK (AP) — It’s been a central argument for the United Auto Workers union: If Detroit’s three automakers raised CEO pay by 40 percent over the past four years, workers should get similar raises.

UAW President Shawn Fain has repeatedly cited the figure, contrasting it with the 6 percent pay raises autoworkers have received since their last contract in 2019. He opened negotiations with a demand for a similar 40 percent wage increase over four years, along with the return of pensions and cost of living increases. The UAW has since lowered its demand to a 36 percent wage increase but the two sides remain far apart in contract talks, triggering a strike.

Fain’s focus on CEO pay is part of a growing trend of emboldened labor unions citing the wealth gap between workers and the top bosses to bolster demand for better pay and working conditions. In June, Netflix shareholders rejected executive pay packages in a nonbinding vote, just days after the Writers Guild of America wrote letters urging investors to vote against the pay proposals, saying it would be inappropriate amid Hollywood’s ongoing strike by writers. The WGA wrote similar letters targeting the executive pay at Comcast and NBCUniversal.

Fain has pushed back against arguments that a big pay bump for the union would jack up costs of vehicles and put the Big Three automakers — General Motors, Ford and Stellantis (formerly Chrysler) — at a disadvantage against foreign competitors with lower-cost workforces in the race to transition to electric vehicles.

“The reason we ask for 40 percent pay increases is because in the last four years alone, the CEO pay went up 40 percent. They’re already millionaires,” Fain told CBS’ “Face the Nation” on Sunday. “Our demands are just. We’re asking for our fair share in this economy and the fruits of our labor.”

CEO pay has ballooned for decades, while wages for ordinary workers have lagged. But did the Big Three chief executives really get 40 percent pay increases? Not exactly.

Executive pay is notoriously complicated to calculate because so much of it comes in the form of stock grants or stock options. A detailed look at the compensation packages at all three companies shows how the UAW’s claim both overstates and understates reality, depending on the view.

Barra, the only one of the three who held the role since 2019, is the highest paid, with a compensation package of worth $28.98 million in 2022. The single biggest component was $14.62 million in stock grants, which vest over three years and whose ultimate value depends on stock performance and other metrics.

Her pay has increased 34 percent since 2019, according data from public filings analyzed for AP by Equilar.

Ford CEO James Farley received nearly $21 million in total compensation in 2022, a 21 percent increase over the $17.4 million then-CEO Jim Hackett received in 2019, according to the company’s proxy statements.