Financial supremacy is what really sets the "Big 6" apart from the rest of the league. Their revenue is significantly higher which means they can spend a lot more under FFP. That allows them to keep the majority of their best players/staff and rebound when they go through a rough patch, or spend their way out of trouble, rather than just fading away.
There is a strong argument that having qualified for the Champions League, with other vastly increasing revenue streams and owners with a bottomless pit of money, Newcastle are on track to join them as a 7th financially dominant club.
For Villa, Brighton and West Ham, we are still a long way behind the Big 6 in terms of revenue and therefore spending power. It would take qualifying for the Champions League multiple times and rapid expansion of our global fanbases to close that gap.
Yeah this is the hope for us as Villa fans. Spending is not just net transfer fees though, it’s wages as well. Villa still can’t get near any of the big 6 in terms of the wage bill.
If we were to qualify for the Champions League, get the revenue from that, bring in bigger sponsors, get more global fans, that’s when the gap would start to close.