Rich should shoulder the tax burden says NB pundit

I was reminded, after reading this post, how quickly people jump to the conclusion that the rich (approx. the top 5 per cent) aren't shouldering their fair share of the tax burden. According to Ezra, the same Gibsonian argument is being made by Obama and Clinton:

Howard Gleckman points out that while Barack Obama and Hillary Clinton aren't as egregiously out-of-touch as Charlie Gibson, they're pandering to the Gibsonian line on taxes, refusing to consider increases for families making less than $200,000 a year, and hamstringing themselves on needed revenue. This gets to a generalized problem in Democratic tax talk, which is that they're very unwilling to talk about taxes in terms of value. There are lots of government services which are actually a good deal for middle income families and should be sold as something that Americans would be wise to invest in. But rather than making a positive case around awesome stuff we're going to get, Democrats talk about taxes in complete isolation from the things that taxes buy, and begin with the premise that they're so odious and painful that they should only be levied on folks too rich to notice. It's not exactly the strongest argumentative ground.