Yes please do look frame by frame. Or better yet, look up the film on wookieepedia and go through the list of characters. All characters who appear, no matter how minor, have an effect on the feel and are relevant when judging the mentality.
Padme's royal outfits and the outfits of the other queens of Naboo are a classic example of the problem. Note that outfits includes hairstyles and makeup. And just because there were senators doesn't mean they all had to be in ornate robes. In ESB we met a showy city administrator (Lando) , but he didn't feel the need to dress up in silly robes or way overdone getup. Take a look at the ROTS deleted scenes of the senators trying to start the rebellion for some outfits.