It's also important to note that this would only affect in-demand programs who can afford to pay stipends and provide waivers (engineering, computer science, etc); we're not talking about disincentivizing future history professors (who generally pay their own way with loans), but high-performing engineers working on challenging topics.
This change will absolutely not increase tax revenue; it might incentivize schools to reduce tuition costs (a laudable goal). More likely, it will drive citizens out of graduate programs (where we already make up a single-digit percent), and further promote graduate school as a pathway towards citizenship (as this latter group is extremely price-insensitive).