Degree Name Switch aroundWatch
That being said, it really doesn't matter xD
You are overthinking how much graduate recruiters care about the subject(s) you studied at university, compared to what relevant work experience and internships you did (or did not) undertake during your degree.
Ultimately people don't really care what subjects you study at university, even for most Finance roles so I don't see why you'd wanna switch it. The only reason is that you might have a little inferiority complex about politics not being a highly regarded subject relative to economics. In reality, nobody cares, most jobs don't even have subject requirements
If an employer spots that you've put one thing inaccurate in your CV, they'll start wondering what other inaccuracies might be there.
And even if they don't check your CV now, they might refer back to it in the future -- for example if you apply for a promotion.
There's nothing to gain by doing this, and potentially a lot to lose.