Lazily posting links without further comment is not really what I think constitutes a good discussion, but I'll bite because I happen to have a link of my own handy.
NPR's Planet Money once brought together a bipartisan panel of economists and asked them what they agree on. Consumption taxes as a replacement for investment+income taxes got universal support: https://nathensmiraculousescape.wordpress.com/2012/08/08/pla...
The effect of a consumption tax would be to never tax investment income until it is spent on something that isn't investment.
Beware Krugman; he is brilliant but sees himself as a pundit in service of a political agenda, and has baldly admitted as much himself. I would be surprised if he disagreed with consumption taxes on grounds other than political expediency. I don't believe that particular question is raised in the posts you link.
You said economists are in agreement on this issue. I showed a prominent economists who isn't. I'm sure I can easily find others. You said that capital gains taxes have terrible consequences, but one of my links shows the history of capital gains taxes in the US, they used to be higher, and terrible things weren't happening.
Your last comment is largely an ad hominem. Consumption taxes are typically regressive.
Edit: your last link did not say what you said it said. It did not say to replace capital gains taxes with a consumption tax. It didn't mention capital gains at all.
Of course, the melange of changes they come up with is self-contradictory: eliminate the mortgage deduction (deducted from income on which you pay income tax), oh, and then eliminate income tax. ditto employer health care plan deductibility, and corporate income tax. i.e.: it's linkbait blogspam of the radio variety.
NPR's Planet Money once brought together a bipartisan panel of economists and asked them what they agree on. Consumption taxes as a replacement for investment+income taxes got universal support: https://nathensmiraculousescape.wordpress.com/2012/08/08/pla...
The effect of a consumption tax would be to never tax investment income until it is spent on something that isn't investment.
Beware Krugman; he is brilliant but sees himself as a pundit in service of a political agenda, and has baldly admitted as much himself. I would be surprised if he disagreed with consumption taxes on grounds other than political expediency. I don't believe that particular question is raised in the posts you link.