Personally if a club is offering 300k a week I'm not going to accept an offer of 180k from a club that knows me, knows I can perform (all signings are a risk after all), supposedly want me to stay and more importantly, can definitely afford to keep me. Rooney was on 300k 3 years ago, Aguero 250k or whatever 6 years ago, van Persie 250k 4 years ago. This is 2017. We don't need to offer 300k a week, but if we were willing to pay up to 250k a week to our best player then he'd be a cunt to move for that extra 50k (unless he really just wants to have 4 Ligue 1 medals in his cabinet).
There's a difference between being unable to compete and being unwilling to compete and if that offer is true then we're definitely unwilling. It's a shambles if we're losing players to PSG for footballing reasons.