Unless Oregon has a way different system than Colorado, it's just not true that there is no negative feedback loop. Tuition only covers part of the cost of public universities. The rest comes thru the state legislature and has to be voted on. In Colorado, even tuition rates are subject to control by the legislature so there are a number of ways that budgets of public universities and colleges are under control.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13