How to answer the dreaded “How much is your current salary?”
I think we can agree - they WILL ask. And it is not in your interest to tell them.
Not telling them is evading, plain and simple. You can sugar coat and wordsmith it all you want, but you're not fooling anyone even with limited intelligence you are evading the question.
I would add that it is absolutely true that some people are lowballed and end up being underpaid. There is a wide range of salaries for the same job. A very wide range. (I would argue maybe being overpaid compared to the value you bring is dangerous as well, since eventually you may be let go because of this later on.)
Instead of all the wordsmithing in your evasive answer, wouldn't the better suggestion be to just go in with a number you have to have, and if they meet that number, you're fine. It seems easier to come up with a salary you can be content with and demand it, rather than get caught up in all the game playing.