In Islam, the husband is obligated to provide for his wife and children.
According to the Holy Qur'an:
“Men are the maintainers of women because Allah has made some of them to excel others ”(4:34)
And Hadith:
“Men are the guardians of their families and it is the responsibility of every guardian to guard those who fall under his own guardianship.”
A man is the guardian of his family (household) and is responsible for his
subjects; a woman is the guardian of her husband's home and of his children and is responsible for them.
Difference between Ease and Necessity should be clear:
A husband is only obligated to fulfill his wife and children's necessity like water, food, shelter and education.
Convenience/ease of wife and children is not obligated upon the husband, and can be provided by the wife as well.
I also highly recommend reading Financial Rights of Women
