The federal stamp went from $15 to $25 in 2015. It was $15 for 24 years before that. It's difficult to raise fees at the federal level since it requires an act of Congress, and I don't see them revisiting the issue for a long time. I think an alternative to what you're suggesting is increase the state migratory game bird endorsement. It's only $7 today. Increasing it to $10 wouldn't deter anyone from buying it, but it would increase the state's take by 43%. More funding at the state level - particularly in Texas - would help them build new and enhance existing wetlands.
Ok, a 43% increase sounds good. But I still don't see a $3 increase creating much habitat or changing anything.
How many acres of quality habitat does each hunter deserve every season? I think that number depends on how often the property will be hunted since birds need to rest. I think you need 15-20 acres per hunter and limit hunting that unit to 2 days a week. And that's just wintering habitat. How many acres does a duck need to raise a brood on nesting grounds? We should be just as concerned with that aspect.
I think if hunters really wanted to make a difference for nesting and wintering ducks, and expect the government to build the habitat hunters better be prepared to shell out $1k a year.
But then again thats why people spend alot of money to join private leases and clubs. You want quality grounds like that offered to the public, the public better be prepared to shell out the money to.
Until then, you get what you pay for. And alot of pressure on the few areas that hold good concentrations of ducks which is why alot of units/wma's go to draw hunts.