Thom the average teacher salary for wisconsin from the 2010 detail information link that you provided (excel spreadsheet) is 49,093 with an average benifits of 25,750 or a total of 74,844 not the 45,000 that you spoke of on last night free speech. That does not include the administrative salary which would make the salary higher, wisconsin does a neat thing by providing detail salaries of administration and i did not get a chance to read the detail report by district so i do not know if there is detail by teacher but it is public information.
Another small correction the teachers don't pay 13 % in social security, one half of an employees social security and medicare is paid by the employer and the rich do not pay the 1/2 percent to medicare on large income only on earned or salary over an income thresh hpld above 100 K much of their income is passive meaning that most is at the 15% tax rate if it is from stock options etc.
I feel the reason that the teachers are villified is that their salaries and benefits are above the norm for the area that they reside in, certainly collective bargaining got them to that place, based upon the district's ability to pay, perhaps they negotiated too well with no provision for allowing the district to keep reserves, easy for the board to agree to increases when faced with powerfull union negotators.
So regardless of if the salaries are fair and equitable, they are above the average and are perceived as such. The common voter takes issue with public servants making more than they do. So how do we raise everyone to be on a finacial level with the inability to take income from the average middle class or lower if taxes are based upon real estate values and values decline, if taxes are based upon income and middle class income is falling, if taxes are based on small business income and there is smaller small business profits. The profits from large corporations are we find out all smoke and mirrors even borders , circuit city, and large volumne stores cant make it. Multi lateral corporations no longer have as their labor force greater than 50 % of all employed americans ie union employees