correct WB, if it sponsors wnated to be in F1 then it would be no problem to obtain backing. But I don;t see even wealthy companies queuing up to paint their colours on F1 cars. Why? F1 is just a bad investment thats why.
RedBull fits the bill themselves because it fits with their marketing strategy but they need to keep cost within reason. I recall Adrian Newey accepting a pay cut when he joined RB but did so because he wanted more free time and flexibility to persue other projects like an America's Cup Racing yacht and even more recently he has expressed interest in developing a RedBull AirRace aerobatic plane. He would never have such flexibility at another employer.
F1 is in dire straits. New manufacturers and sponsors are not knocking down doors trying to get in. No major manufacturer attempted to take up the slot left by USF1. All the talk about VW in F1 is just politicing trying to lure VW in but they are too smart to get suckered in under the current rules. Budget caps and cheaper engines ar ebrilliant ideas that were scupered by selfish politics and a lack of desire to change by people who think they can afford for the world not to change around them.
I have always supported the budget cap, I first mentioned it the F1-live forum years ago and was labelled a dillusional fool. Rest assured it will remain in the background and will eventually become the way F1 does business. The change will simply take place quietly and people won't know the difference.