The most discussed topic in recent days, regarding Formula 1, is that of the budget cap, one of the new challenges of the Circus, which however seems to bring with it various problems.

The budget cap was already introduced last year - the teams had a cap of $145m to spend - and this year it was reduced by $5m, which will happen again next year. It is said that the top teams can exceed this threshold, which does not seem impossible, given the words Christian Horner said to Sky Sports, during the Monaco GP weekend.

"I am convinced that all the main teams will go beyond the 140 million budget cap" Red Bull team principal said.

He then added in a separate interview: "There's an awful lot of things that need tidying up within the existing cap that we have, that's being rolled out to being an engine cap as well.

"There's all kinds of complications with that, again, with companies' reporting structures, etc. So, there are many, many complexities, but I think we need to go beyond that."

Christian Horner talked like this, as Mattia Binotto did, of a probable expansion of the budget cap, also in terms of salary for both drivers and team employees. It would not be a one-off solution, but a salary cap would be added to the budget cap - designed for car development - to further reduce costs.

The Ferrari team principal said Formula 1 is considering the option, but nonetheless “there’s not a straightforward solution, especially for the drivers' salary cap".

"We are discussing it and trying to understand what can be a solution," Binotto added.

"It will not be in the short term, the reason for that is we already have contracts in place, and we cannot simply breach them. There are legal implications, to understand how to do that, so it's a discussion.

"It's an important one, we understand it and we recognise it will take time, but certainly we will go through the process."

Other team prinicipals opened up on the matter.

"I think it's the right approach to try to coordinate it with the budget [cap] and to have perhaps an allowance for this," stated Alfa Romeo boss Vasseur.

"You could overshoot the limit and you will have to take part of your budget cap, I don't know. But we have to find something like this because it's important for the sport."

And  "I'm in favour of adding that underneath a global cap so that the teams can trade off driver skill with updates, because ultimately both things bring performance on track," Otmar Szafnauer said.

Andreas Seidl, McLaren team principal also gave his thoughts: "I think it's important now to simply keep continuing the discussions behind closed doors, because here's no point to now in public discuss how could that all work. So let's stay tuned."