I still believe that we should look at Ligue 1 to strengthen the squad. Lots of quality players there, especially at some of the positions we have problems the most like Central midfield and fullbacks. We could really use someone like Ndombele etc... Our philosophy should be taking the best players out of top 4 teams, not taking the unwanted players from the top-top teams.
Robben, Van der Vaart, Sneijder, De Bruyne, Salah, Lukaku, Alexis Sanchez, Yaya Toure all went onto bigger things after being deemed not good enough for their respective leagues top 4 teams. People also forget that Alisson was backup to Szczesny the season before he made his move to Liverpool.
To say our philosophy should be to sign the best players from our rivals when all of our domestic rivals are far wealthier than us is barmy. There's plenty of players who are unwanted at big clubs who have a point to prove & could do a great job for a team like ours. In 5-10 years financially we might be able to do what you're suggesting but at the moment it simply isn't a goer pal