Yes there is a voting slider if you have sufficient SP to require it.  It allows you to adjust your payout just like the CLI wallet has allowed for some time.

Another way to look at things is that if the whales vote less that means greater rewards for the whole pool of people voting.  In essence it means better distribution of the money.

I could only imagine having a high percentage of my voting power.  I barely ever get above 30% because there is too much great content.