More than any other season in recent years, the championship-chasing teams are facing a delicate balancing act when it comes to resources with regard to developing their current car and the 2014 model.
That is due to the change in powertrain regulations, as the 2.4-litre V8s bow out after a nine-season run and are replaced by turbo-charged 1.6-litre V6 units.
In turn, it means a fundamental redesign of the entire car, and with it the majority of any team's finances being ploughed into next year.
Mercedes are not alone as Red Bull, Ferrari and Lotus are in the same boat, but it does put pressure on Lewis Hamilton's hopes of hunting down Sebastian Vettel in this season's title race.
With Hamilton 58 points adrift of Vettel in the drivers' standings, and Mercedes 77 behind Red Bull in the constructors' heading into Sunday's Italian Grand Prix, both driver and team face a tough ask.
As Brawn pointed out: "We're not thinking in terms of winning the championship, no.
"I don't want to sound like we don't want to win the championship, of course we do, but we're not compromising our 2014 programme.
"That is well defined, is in good shape, is progressing well, but there are still some big challenges.
"Lots of our team are focused on that and they're not going to be distracted from it.
"There are a small amount of things we can do for the rest of this year, and if things keep going then we will continue with them.
"We still want to try and win as many races as we can, but as I've said, we don't intend to compromise our '14 programme."
Brawn knows what it is like to be in a position where a team throws in the towel on a season, and Mercedes are far removed from such a scenario.
"The reality is, to be in a position where you can abandon the season is normally when you don't have a very good car," added Brawn.
"In 2008, when I was with Honda, we had a pretty poor car that year.
"It was a very easy decision halfway through the year to say 'right, let's forget it' and to leave a crew of people to focus on it for the rest of the year and 100 per cent focus on the following year.
"If you're in good shape you don't have that opportunity, you have to manage your resources all the time.
"Red Bull are having to manage their resources between this year and next year, as are Ferrari. All those teams are.
"It's a measure of where you are that, if you are having to manage the resource between '13 and '14, then you're in a good position.
"Fortunately we've a good car this year and we want to keep it going.
"It's great to win races, which is why we are here, and we want to win as many as we can this year and things will develop as they will develop."
Brawn appreciates it will take "some pretty unusual circumstances" for Vettel to be denied a fourth consecutive title, although insists "it can happen".
With Hamilton on a run of four consecutive pole positions, the 28-year-old - winner last year at Monza with McLaren - should again be in the hunt for the victory this weekend.
Vettel's triumph in Belgium 10 days' ago, though, suggests Red Bull have discovered the low-downforce spec required for both Spa and Monza given the high-speed nature of both circuits.
After finishing third at Spa, 28 seconds behind a dominant Vettel, Hamilton's car will boast a refined version of the low-drag package which Mercedes hope will improve their race pace.