Joe Stack had simply had enough. Every time this fifty-three-year-old independent engineer and software consultant from Austin, Texas, had set aside any money at all for retirement, the Internal Revenue Service (IRS) seemed to change the tax laws or whittled away at his earnings with new restrictions. A change in the income-tax regulations in 1986 had removed an exemption for software consultants and engineers, effectively consigning them, in his eyes, to low-income wage work. He just couldnt catch a break. Hed moved from Los Angeles to Austin, remarried, hoping to get better contract consulting work, but the wages in Texas...
http://www.salon.com/2013/11/01/why_is_always_a_white_guy_the_roots_of_modern_violent_rage/