These sort of things can be very telling, as they almost give more away by accident than is meant to. I mean strangely he's not actually linking Everton to Koulibaly, but rather saying Everton will spend lots of money on big players so of course Koulibaly is on the agenda. I remember Pulis saying something similar when Moshiri came in, a throwaway comment like "we know Everton will spend big" almost as if it was common knowledge.
To me these sort of comments are worth 100 wild headlines about who Newcastle may or may not buy. It's an implied statement and almost as if he doesn't want to give it away.
As re Koulibaly, sure? Napoli are obviously keen to sell and re-build. I wonder if they may need too in order to satisfy financial questions. I've seen Liverpool linked but can't see them having the cash to fork out, or wanting to stunt Gomez's place and have a 5th, very expensive centre back at the club. United for me are big favourites, City would be sensible to buy him (if they are smart they buy him, and next to Laporte probably win the league again) but if they drop out, why not us?