What's wrong with tuition-free college?

[frazzled]

26. My state and city have gone a long way to addressing that

Tuition is free for all four years at the University of Illinois for in-state residents whose families have incomes of $67,100 or less.

You must be a U.S. citizen or eligible noncitizen
You’re an Illinois resident (parents listed on the FAFSA are also Illinois residents)
Your family income is $67,100 or less
Your family’s assets are $50,000 or less
You’re under the age of 24
You’re admitted as a new freshman or transfer student
You attended and graduated from an Illinois high school
You must be enrolled in a baccalaureate degree program for at least 12 hours during fall or spring semesters

https://osfa.illinois.edu/illinois-commitment/

Tuition is free at any one of the City Colleges of Chicago (community colleges) if you graduate from a Chicago Public School (and now several partner schools) with a 3.0 grade average and are college ready (get a score of 17 or higher on ACT math and English; or get 460 or higher on SAT English and 440 in math; or pass a "Completion" test). Full tuition and books covered for three years. Graduation rates in this program have been 80%.

http://pages.ccc.edu/apply/star/

I think states (and municipalities) need to initiate more of these programs before it is possible on the national level. After all, public higher education is under the purview of states and cities, not the federal government.