i'll be the odd man out, but I prefer it this way. this way, I get bonuses from my credit card company for running up the balance. *But* if Google were to offer a bonus 2-5% for transfers rather than payouts, it might be worth it. Nah, it'll never happen.
google will still always be the best PPC option because it has so many searches and partner sites. google will kick ass at everything, at least they dont treat customers badly or overcharge for stuff. soon enough there gona launch a new auction site to kick ebay out of here, as some of you may know, ebay have one of the internets worst reps for customer service. so nobody likes them.
I think it's because of accounting-technical reasons they have to keep it seperate. I'm not sure but AdSense and AdWords may be two completely seperate business entities. I wish it was possible though but there's probably to many downsides for them otherwise they would have done it because it does make more sense from a webmaster's perspective
When it was rumored that Google was going to take on Paypal, I was hoping for a Paypal-type system that you could receive Adsense payments into, and use to spend on Adwords. Google Checkout left me really unimpressed.