You have to realize that Barcelona is THE club to play for as a Dane. No other club comes close. Not Real Madrid. Not Manchester United. Not PSG.
Our greatest heroes, Michael Laudrup and Allan Simonsen, both played at Barcelona, and they are both idolized in our country. Those are the players Christian Eriksen have looked up to during his childhood. Why? Us Danes recognize the Scandinavian heritage. The sturdiness of being a Scandinavian. Something that expresses itself in our way of playing football. BUT we also think we play the superior form of technical football in Scandinavia. Our Swedish and Norwegian brothers dwell at the efficiency of kick and rush, where we want efficiency mixed with finesse. It's romantic, naive and an arrogant view, but it is how it is. Ask any Dane, Swede or Norwegian about this, and they will tell you the same I'm sure.
So, I don't think this is a matter of wage-level for Christian Eriksen. If Barcelona is truly interested, Christian Eriksen will join them. Because for a Dane Barcelona is the top-echelon. He will forever be placed alongside Michael Laudrup and Allan Simonsen in our football folklore. And that surely must be very difficult to resist.