King's Purse - Pocket Money or Big Bucks ?

[_Tristan_]

I know what the principle of King's Purse is : That is the inherent wealth of said King...

What I don't understand is how it is decided...

For example, the French purse AFAIK is 1500 $, whereas the Hungarian one is 2500 $, at least in the first few turns, but that's when it matters...

Do some trait of your king have an impact on that and if so, which ones ?

Does your economy have an influence on that also ?

Or is it a fixed value depending on each faction ?

[EDIT] Also how do you fight corruption in your settlements ?
I understand that Distance to Capital has an influence but what can be done to reduce it ?