In fact, a law may have passed by the time you read this. Several changes were proposed, and I won't try to guess the final verdict. However, the problem will not be solved. There are many ways in which two people pay more income tax if they are married than if they were single. There are at least a couple of dozen tax rules which can cause this.
Tax brackets make the it worse as income rises.
True, the numbers vary from couple to couple. Budding Romance Imagine two couples considering marriage. These laws were first written about 50 years ago. Two-earner couples were rare. Some expense is saved by living together.