Whiteside 20 Parsons 22 Batum 25 Horford 25 Anderson 17 Biyombo 13 Bazemore 17 Lee 10 Afflalo 10 Henderson 8
Like you just mentioned, it only takes one dumb GM (NYK) and one lucrative contract (Conley) before the rest of the market explodes and people are being signed in an arms race. Pull out one piece, and the jenga tower falls.
OP's spreadsheet did not format too well on post; the first column is 2015-16 salary (i.e. .9million or $900K for Whiteside); second column is years experience in league; third column is next year's salary, which only Zoltar knows.