Activities should pay according to the skill and effort required.
half of players are at or below median skill.
problem of balancing in a nutshell. add to that:
this forum is full of players, who invest a lot of time to actually find out about the game. sometimes we get a post like "what am i doing wrong in combat", but whoever spend time mentoring someone on something in the game (how to find a hotspot. how to do no-skill-no-risk bounty hunting in a high res. how the market works. how to get rep with a faction etc. pp.) can't ignore the huge imbalance of the player group, in skill, knowledge and ethos to find out about the game.
which means, any activity paying high will be "too high" to those, who like to invest time into how to play the game and poke at it. and if they do it for several hours a week, taking the game as a hobby, they have credits in abundance.
i personally think, earning is generally too high, and mining is just nonsense-high - and i personally think, there is no risk to pve combat. but i'm aware that this probably does not meet with somebodies experience of firing up the game 2 hours every two weeks and just want to play around a little without any looking into how it works.
to give an exampel: i took a break when core mining was introduced. at some point returning, i thought, i have to try the new mining tools. so i outfitted an AspE to learn the tools at hand. i'm pretty sure that's an untypical move for someone who just wants to play a game. of course by now i'd claim, that there is not much skill involved in strip- or core mining.