That would not make sense because the ~10 minute interval would be broken.
-snip-
No, miners would just fill the blocks with TX they created. The "efficiency" can be simulated hence the average interval would not be broken, miners would create pseudo filled blocks instead of actually filled because its impossible to distinguish between a "legit" TX and one just created to fill the block to the minimum requirement.
I was working under the system that they would not try to cheat the system.
Yes, there are complex dependencies between miners, users, developers, merchants and I would also add node operators now. On top of that every person can belong to any combination of these 5 groups. Bitcoin is not going to succeed if a solution only works for a few of the groups, but not for others.
Correct. If you lose either one of those then you lose Bitcoin. Nodes are quite important IMO, without the majority of them Bitcoin would lose its decentralization.
OK - that would be counter-productive, so I'd better forget that idea.

You can close this thread if you want to (look at the lower left corner of the thread).