Kevin Carey:

Public education costs a lot of money — over $500 billion per year. Over the last century, there have been huge changes in where that money comes from and how it’s spent. In 1930, only 17 percent of school funding came from state sources, and virtually none came from the federal government. Today, the state / local / federal split is roughly 50/40/10 (individual states vary). People still say all the time that “most” school funding comes from local property taxes, but that hasn’t actually been true since the mid-1970s.
On the whole, this change has been of tremendous benefit to disadvantaged students. As states have assumed the primary role in funding education, they’ve tended to distribute money in ways that are, on the whole, more equitable. The same is true for federal funding, most of which is spent on behalf of poor students and students with disabilities. (This works because taxpayers have a weird psychological relationship with their tax dollars. Rationally, people should view every dollar they pay in taxes and receive in services as equal, regardless of the basis of taxation or the source of the services. But they don’t. People feel very strongly that locally-generated property taxes should be spent locally, while they feel less ownership over state taxes and even less over federal dollars. As a result, they’ll tear their hair out if you propose transferring 10 percent of their local property tax dollars to a low-income district across the state, but they’re far more sanguine if you propose a state school funding formula with precisely the same net result in terms of the taxes they pay and the dollars their local school district receives. It doesn’t make sense, but that’s okay, because this irrational jurisdiction-dependent selflessness is what allows for the redistributionist school funding policies that poor students depend on to get a decent education.)

Madison’s revenue sources are a bit different than Carey’s example: 65.1% from local property taxes, 17.2% redistributed state taxes and the rest from grants, contributions and other sources.
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Finally, Patrick McIlheran notes that Wisconsin’s tax burden continues to rise:

Wisconsin’s entwined state and local governments taxed a sum equal to 12.3% of Wisconsinites’ income last year. That was up from 12.2% the year before and 12.1% the year before that. This biennium, the state is spending 10.5% more than last. Ever, the numbers rise.
They rise because the state’s costs do. But taxpayers, too, pay more for gasoline, food, power and practically everything else. Times are tough. You’d think the least government could do would be to avoid piling on.