In a nutshell, yes that would be OK as long as ALPA established a "professional rate" that was indexed to inflation as the minimum. Certain benefits included as well. I think employers would entertain the notion because they would have a handle on what the costs would be if they wanted to employ a "professional" pilot corps.
Now to enforce the professional concept, you have to treat non-professionals as what they are. You have to be willing to only extend the benefits of "professional" society to those who work for companies that employ professionals.
If VA wants to hire A320 pilots at substandard wages (don't know if they do), then other "professional" pilots have to ensure that their behavior working for a nonprofessional company is unacceptable, and benefits reserved for professionals will not be extended, ie jumpseats, alpa services, etc.
Make the benefits such that everyone only wants to work for a professional company and VA will have no choice but to hire professionals, right now, they can hire anyone, and they are welcomed into the pilot profession with open arms, even if they have to commute across country to work a job for 1/4 less pay in the highest cost area of the country.