As I recall, the amount can vary between 10% and 15% give or take. The bottom line is that it comes off the top and reduces the amount available for the program.
I'd like to think that the folks running the program have a basic understanding of budgets and can do their own book-keeping without having to fund another arm of state government to "administer" the funds.
One might want to ask one's legislators exactly what service that budget group performs on a dedicated account like the Puget Sound crab endorsement fund. If that fund collects roughly $2 million/year that means about $250K goes to the budget folks. And for what? To the best of my knowledge they don't audit those accounts nor generate an audit report (that would be the SAO).
And then there are the CR endorsement fund and the PS recreational fishing enhancement fund (formerly blackmouth stamp) with the same losses.
It would seem that the advisory group oversight alone should be sufficient, less costly, and provide stakeholders with a more credible result.