I think I'll start with the conclusion of this post right here at the beginning for a change:
If it's a problem for a government that they loose income from a so-called sin tax, it's not actually a sin tax. When I say sin tax I mean taxes designed to make people stop doing something that is bad for themselves, the people around them, the environment and so on. In other words... it's supposed to discourage people from doing something we don't want them to. So if you start losing income from a sin tax, you should be happy with that, and not desperate to find something else to tax like some
politicians apparently are right now. Because losing income from a sin tax should mean that you are gaining somewhere else. Take tobacco taxes for example: If people stop smoking, whatever you loose in taxes should be more than made up for by the benefits of having a smoke free and thereby a lot healthier population: Health care expenses would be lower, people will be able to work more and generate more income taxes ... and so on. If this is not the case in your country, your government is a bunch of incompetent fools. Simple as that. If it is the case in your country, and the government still wants to cover the losses from a sin tax by taxing, well the e-cigarettes that are in part responsible for their so called losses, then they are equally stupid... or just greedy.
Some countries have made themselves dependent on sin taxes, other have not. I wrote
a post on this almost a year ago. Back then I found that the US and Norway (hopefully among others) are not dependent on tobacco taxes, and should in fact, from a pure economic perspective, welcome anything that will stop people from smoking. So California Senator Mark Leno (from the Forbes article I linked to further up) is either stupid enough to not see this, or greedy. In any case he's lying when he proclaims this, cause this is
definitely not the real reason he wants to tax e-cigarettes:
“We’re going to see hundreds of thousands of family members and friends
die from e-cigarettes use just like we did from traditional tobacco
use”
The UK on the other hand... are in deep shit in this matter. They messed up and need to find a way to make up for their losses, but taxing e-cigarettes (or anything else that can get people to stop smoking) will only get them deeper into the shit. It might "solve" their problem in the short term, but it will be like peeing in their pants when freezing...

photo credit: E-Cigarette/Electronic Cigarette/E-Cigs/E-Liquid/Vaping via photopin (license)