Paul Krugman write on the meme:
Update: And the Romney people respond with deep voodoo, invoking the supposed fabulous growth effects from his tax cuts. And who could argue? Remember how the economy tanked after Clinton raised taxes? Remember how great things were after Bush cut them? Oh, wait.
More seriously, we have lots of empirical work on the effects of tax changes at the top — and none of it supports the Romney camp’s claims. What we’ve just learned is that they were faking it all along. There is no plan to offset the tax cuts; Romney is just intending to blow up the deficit to lavish favors on the wealthy, then use it as an excuse to savage Social Security and Medicare.