Why doesn't it work

[Mountain]

Today i came at the salt mine.
But of course it didn't work out on the way I was thinking

 

 

[Man]

_M_

 

[Robert H]

After 10 hours of mining and 2 broken fingers you've finally made 500k from selling salt.

 

[Maxi]

It takes the sand up with invisible lasers 24/7