Red Bull's Helmut Marko believes Mercedes' rivals will "never catch" the world champions such is the advantage it holds under the V6 turbo hybrid engine regulations.
Renault-powered Red Bull is lobbying hard for regulation changes in Formula One after Mercedes' advantage appears as strong as ever in 2015.
"The crux of this whole power unit problem is that it was decided to freeze the development," Marko told Speedweek. "Forget the tokens. Whoever found themselves behind in preparing for this (turbo V6) concept has no chance of ever catching up."
Marko acknowledged it is unlikely Red Bull's rivals will consent to a rule change.
"For quick changes, unanimity is required," he added, "and changes in 2017 require a majority vote. Mercedes has four teams, which is the highest number, so no majority decisions can be achieved against them."
Ferrari has made big engine improvements over the winter, with veteran technical figure Pat Symonds (who has Mercedes power at Williams) claiming that the Italian marque is now essentially "on par" with Mercedes.
But Marko argued: "Ferrari's performance must also be seen relatively: they are not closer, they are just better than last year.
"We at Red Bull do not believe that, with these restrictions in this form, any other manufacturer will ever catch up with Mercedes.
"If you do not have that engine, you have no chance at the moment."