What a childish, selfish statement to make.
What a great start we are off to.
Multiply those thirty watts by the number of GPUs sold and all of a sudden it makes an enormous difference.
Bud, that's still nothing. We are heading into a world where using upwards of 10kWh per day just to drive to work for hundreds of millions of people is perfectly acceptable, and you're worried about 30w idle consumption of a card that will, at best, 2-3 million? Even if you want to limit scope to "waste", the 30w of GPUs is such a nothingburger in terms of lost power. A single school building leaving its lights on overnight wastes more than that in a few minutes!
There's mountains, there's molehills, and then there's the grain of sand you are trying to turn into a molehill.
There is no good reason for the same, incredibly obvious, defect to persist through AT LEAST THREE GENERATIONS of product. Zero. None. Stop making excuses for AMD, and stop using whataboutism to try to deflect attention away from their persistent failure. Wasting energy is never acceptable, especially if the competition has figured out how not to.
The competition has had similar issues for years, AMD only recently started fixing it (and it isnt totally fixed). Almost like drivers r hard. But I'm sure you could do a better job.
Sure I can do the maths.
PC on for 16 hours a day 30 watts at 55p unit. Thats 27p day, multiple by 365 days. £99, add VAT thats just shy of £120, but I was thinking of the £150 card, so my mistake there. (not a full mistake if the £150 also affected)
So, yeah, like $105. If that's a lot of money to you, first question is why are you buying a $350 card, and second, why on earth is it on, at IDLE, for 16 hours a day? Not using it, at IDLE. Seems like you have a bigger issue with waste from improper use of a PC at that point. If you have a card like this, in a work PC, then ideally it should be DOING something for that timeframe. If its just doing web browsing or other non heavy work, then having said card is pointless and the far more efficient APUs should be in your PC instead.
Curious though why does wasting power been brought up offend you so much?
The problem is people bring up idle power like it is going to bankrupt the world because of a few watts of power. It's not, and claiming things like "the idle power from a year will cost as much as an A770" is totally incorrect. People are blowing this "idle power" issue WAY out of proportion acting like it will take an entire paycheck and nobody but the rich can afford to run a PC as if they were some gas guzzling hypercar. They're not.
People will then take that incorrect information and use it to make ignorant decisions about hardware. "oh why would I buy an AMD card, look how much higher its idle usage is, I better get an nvidia card instead for $200 more" and in the process wasting nearly $200 because of an ignorant knowledge of both math and money. They'll prattle on about how much more efficient their GPU is while ignoring the massive carbon ramifications from them building a PC to play some bing bing wahoo. Gaming, at its core, is a massively wasteful hobby, and the moran grandstanding about power use is supremely annoying.
Financial illiteracy is a major trigger. Like the imbeciles who bought toyota prius' on a 5 year loan with 8% interest because gas went to $5, instead of keeping their perfectly serviceable paid off vehicle, then prance around talking about how much money they are "saving".
Because he thinks it is his human right to be able to waste as much energy as he wants, as long as he can afford to pay for it. F*ck the natural environment?
You have no idea what I think, and your uninformed rambling has no relation to what I think. I have on many occasions advocated for the use of nuclear power to eliminate fossil fuel usage and lamented ont he waste of resources in a variety of manners. If you think a couple dozen watts of electricity from cards for a niche hobby is a major issue, oh baby just WAIT until I introduce to you the environmental catastrophe that is silicon chip production!
I think you're much more triggered than anyone else but whatever. People make stupid decisions everyday. Like we're talking about idle power but ignoring the part where the cards are not that efficient fps/W when running vs the competition, just like intel CPUs which are pretty terrible. 
I need to use my PC either for gaming or work, not both, so buy a 2nd PC with APU for work and non gaming tasks, and then just use dGPU for gaming, better than manufacturer making power efficient drivers lol.