Jarno Trulli has hit out at the growing influence of so-called 'pay drivers' in Formula One.
It is rumoured that, despite his 2012 contract, the Italian veteran could be ousted by Caterham in favour of the well-backed Renault refugee Vitaly Petrov.
Trulli, 37, suggested Renault - becoming Lotus for 2012 - suffered last year as the team collected sponsorship dollars brought by Russian Petrov and Bruno Senna.
"Kubica is a great driver who can get the very best from the car," he is quoted by La Repubblica, "and because of that they were a dark horse.
"When Robert was out, that was the end. Petrov was not in a position to lead the team, and Senna showed that he was not good enough."
Brazilian Senna replaced the experienced Nick Heidfeld mid-season.
Trulli commented: "With his experience, Nick scored almost as many points as Petrov even though he (Heidfeld) did only half the season.
"There is no rule, but it is true that those who pay are less accustomed to suffering. They are less committed," he claimed.
"Hiring them is a business decision but in my opinion it's not worth it," said Trulli.
It is true that those who pay are less accustomed to suffering
Red Bull team boss Christian Horner, however, said the growing debate about 'pay drivers' recently has been overstated.
"For a team it has always been about finding the right balance between financial considerations and talent," he said.
"It's something that is as old as Formula One," Horner insisted.