This proposal is about allocating additional SPS to staking rewards. So if anything, this is going against the whitepaper, by prolonging the staking rewards which are set to expire mid of next year by another 6 months, see the table above.
That said, I don't like how whitepapers are used as set in stone, they are an idea and things must be adapted. I'm just against this adaption, because giving more SPS as rewards for non-gameplay activity is a DEFI move and SPL should, and mostly wants to be, a game. So don't waste SPS on paying people rewards for staking. Especially not when simultaneously a mini-set is coming with the main purpose of gaining more SPS.