Divulge the salary number at the high end of what you want, inclusive of the value of all benefits. State that you are more than willing (hoping, in fact!) to reduce the raw salary number in exchange for a supportive culture with good people, meaningful work, and productivity-enhancing benefits.
It's not a lie and it gets you exactly what you want and need.
If they want to know what you are making now, you are making exactly what you stated above.
Since there's no way for an employer to compare their culture/benefits to another company's, it is logically unsound for them to consider your past paychecks. Remind them of that.
The other simple approach is to say, "You know better than I what your organization can do with my talent. I want to work were I am most effective. The salary and work product your company offers is my best way to estimate my impact."
It's not a lie and it gets you exactly what you want and need.
If they want to know what you are making now, you are making exactly what you stated above.
Since there's no way for an employer to compare their culture/benefits to another company's, it is logically unsound for them to consider your past paychecks. Remind them of that.
The other simple approach is to say, "You know better than I what your organization can do with my talent. I want to work were I am most effective. The salary and work product your company offers is my best way to estimate my impact."