Here's the bottom line...
Do you like winning? Are you willing to pay a little bit for that? Do you want to have your pick of the very best crew available? Well then, keep paying for the beer. Everyone will know that you do that, and all the very best crew will have no problem deciding who they want to sail with--YOU!
Stop paying for the beer, and instead of getting your pick of the very best available, you'll just get whoever decides that maybe they like sailing with you, or whoever no one else has picked.
It's a pretty simple equation, when you get down to it.
Seriously. Running a competitive and successful racing boat is one of the most expensive and stupidest endeavors one can ever embark upon. After the huge boat payment, the constant sail purchases, the keel fairing, the bottom cleaning, the yacht club fees, the entry fees, the missed time from (a presumably very high paying job) for away races, the repairs required from riding all of your **** way too hard all the time, booze for the crew is barely a blip on the radar.
Crew is easy to find, good crew isn't, and crewing on a competitive race boat requires a level of discipline that moves past recreation into the level of work. If you're not going to pay the crew, the least you can do is to buy their booze. If you really want the rock stars, you might also want to look the other way when the bowman is getting fresh with your daughter.