Don't remove them completely, cos in a few months time someone will post a suggestion saying "WHERE'S MY SENATORS?!"
Maybe all you need to do is remove their authority to give orders? Although, having a senator with no form of influence or power is kinda... weird..
Also, having senators gives players something else to aspire to play as, maybe what needs to happen is a chat with Mas Amedda and the next Palpatine, and through this discussion you can come up with more "realistic" ideas on portraying roleplay with the senators.
Cos let's face it, senators are cool, and they're different.
Also, I'm sure senators on the base is the least of worries, it's a GMOD server, not a movie franchise.
Neutral, I like the idea but there is pros and cons.