My AW has no idea what a budget is - I handle all the finances and watch how things get allocated. I can have input on how some of the money is spent - but not what is spent on wine and groceries! It's sad how much we throw away because she buys stuff we don't need/want and can't eat it all before it goes bad.
She grew up in a home without much money and I think she feels that now that she's in a better situation, she can haphazardly spend. Drives me nuts.