Earlier quoted context omitted.
I don't think you deserve such down-voting ... Paul Graham's page has a link to T.J. Rodgers' congressional testimony to this very point. However, there is "support" and there is throwing money. You're right about throwing money, but I think you're wrong about intelligent support. DC can always, _always_ do a better job by: 1) Not subsidizing anyone, ever. 2) Increasing transparency of its laws 3) Taxing negative ext…
"Taxing negative externalities rather than positive ones (so tax carbon instead of capital gains)" Problem: Negative externalities are supposed to go away. At which point you have no money. So you have to tax things (like income) that people just aren't going to do away with!
But, you do have a point because 'proper' tax rates for negative externalities only pay for abatement/offset of the externalities' harm. You can't count exclusively on such taxes to pay for other unrelated public goods. (If you did, you'd be overtaxing the externality, causing underproduction of the related goods, which can be just as damaging to overall welfare as the original unabated negative externalities...)