2050, that is way too far into the future, we need a target by 20205. it can be done, if the US can go to the moon in <9 years then we can really put some science behind all this.
We need a massive expansion of car charging points for a start, paid for by taxes on fuel. We need a massive recruitment drive for people to be able to install and maintain this equipment too.
This is do-able but the current generation of politicians don't want to do it, 2050 sets it so far ahead most will be dead by 2050. So it passes the buck to the next generation or even the generation after that.
probably not if the stats on buying plastic bags are anything to go by, I buy 2/3 a year usually when one falls apart I buy a nw one, i just take it with me each time. It seems people are buying one a week, why not take a bag out with you.