You guys view these things a little too simplistically. Seriously. You can't just look at these kit deals in a linear fashion, and try to compare us to Barca, Real Madrid, etc.
As with any business, you need anchor tenants. Imagine starting a new consulting firm - you'd like to put Coke on a retainer to guarantee you money. Or you're opening a mall. You call H&M or Zara before anyone else to ensure you get traffic. Having these megadeals with the biggest football brands makes your business worthwhile. It makes your relevant. You're outselling Nike if you're Adidas, and top of the pops. You pay more for the very best guys - Barca, Real, Bayern, United, etc.
You want us to compete with these guys? Your boy Wenger needs to take the risk right now and buy big. Get in some superstar players and get trophies. That's what people are paying a premium for. Trophies and superstars. Not 4th and Giroud.
