non-errors; their income/incomes?; (to?) which ... objected

non-errors page:
http://www.wsu.edu/~brians/errors/nonerrors.html


"The richest pay more in tax with their income/incomes"?
http://groups.google.com/group/alt.usage.english/browse_thread/thread/591f3bf97c541abe#

 (to?) which everyone objected
http://groups.google.com/group/alt.usage.english/browse_thread/thread/706bbc0369a4cc83#