To start off, I'm not claiming Pathfinder imbalanced or balanced, I'm just asking how some of the decisions were made when it comes to how the classes are different. This comes from the desire to create a class that is balanced... I know that its up to the DM to customize the encounters to make them interesting and highlight certain class features. I suspect my answer can probably only truly be answered by the developers of the game, but I'll give the general forum a shot.
Example of differences between classes: Take Monk Vs Barbarian, Monks get all good saves, where as Barbarians get only 1 good save.
Are monks more likely to be targeted by spells that require saves? Based on what I see, monks have more immunities, so why would you give them more saving powers? Do monks have less damage potential so they should have more defense possibilities?
Another example: Sorcerer vs Wizard, Sorcerer gets spells slower but knows more spells per day, vs Wizard who gets spells faster and have a total spell pool that is greater (albiet less per day).
Does making a sorcerer's spells known per day be higher than a Wizard's even out because every other level a Wizard can cast a spell from a higher level?
To summarize I realize the classes above are much different than the examples I brought up, but I'd like to know how the classes compare with each other, and how do those differences add up to equal a balanced situation.