Many issues with the game even aside from the ripping off. One of the biggest would be rounding internal numbers rather than being exact- such as 'reduce expenses' skill.
Nobody cares if the display number is rounded, but every level should have an effect, especially if that effect is more than 1 copper, but probably always even if it's less. - this applies to all skills, especially also the magic ones, but expenses most of all
*Oh, and selected property doesn't save when reloading the game. Even though properties don't have an active cost.