Jeff Bezos owns both Amazon and WaPo. The original comment went to sustaining WaPo on Amazon's revenue, not ownership. The conflict of interest already exists. Don't expect anything substantially critical of Bezos or Amazon from WaPo.
Amazon is not owned entirely by Bezos so he would have to justify using Amazon revenue to support WaPo to the rest of Amazon ownership. If Amazon owned WaPo that would be an easier thing to do in the same way Amazon may subsidize IMDb, Zappos or Whole Foods. In this case the distinction between the two matters. Just because the same person is in a similar position at both companies does not mean money can easily flow beteeen them. This is the same reason the WaPo is not a tax shelter for Amazon.
