@aggroed's point is that with 75M Steem Power, one would have enough votes to elect all top 21 witnesses. This is because the most highly voted witness of @yabapmatt currently has 46M Steem Power voting for him. This assumes the rest of the community does not create additional votes to counteract any voting done with the STINC stake.

Note that an account can vote for multiple witnesses. I didn't originally realize this because it's so counter-intuitive. Basically voting for multiple witnesses does not diminish the contribution of each individual vote.