Would you pay someone to mine shares for you?
Suppose you had a non-standard transaction that you wanted to get approved, but no mining pools are accepting it. Or suppose you had a ton of transactions and want to avoid the fees?
Imagine a reverse mining pool, you pay the pool a fixed price / share to find hashes for you. You get 100% of the block when it is generated.
With this setup you remove power from the 'miners' to determine what gets included in a block.
So how would you prefer to hire mining power?