The issue:
Considering the fact that Pacho's extended client has nightvision, Miner's helm is widely useless.
For those without full industry this allows you to use a cylinder hat to get to 5 industry (I don't think you can actually go to 6, but I have no idea on this).
This actually (unintended I'm guessing) allows those who use 'cheats' to prosper more than those who play with the regular client (and would have to use miner's helmet, thus losing that buff).
The solution:
Give an incentive for using the Miner's Helm instead of using other hats while mining. It's pretty much useless now to anyone smart enough to use the forum.