The system should use all the RAM. You paid for RAM, why have it sit there unused? As long as the next user process gets the RAM it asks for, I want the system

The system should use all the RAM. You paid for RAM, why have it sit there unused? As long as the next user process gets the RAM it asks for, I want the system to use all my RAM to cache everything. Edit: even to the point of compressing pages, since it's faster to uncompress them than fetch from disk.