I agree, you need to lead by example and work on identifying some shared goals. I am totally on board with being frugal (heck, I'm the one who introduced my partner to MMM, not the other way around!), but it still gets my back up when my partner asks me why I spent so much money on X or appears to be phrasing frugality as things *I* should be doing (fyi, this is not a common occurrence at all) as opposed to things *we* are doing together for goals that *we* both want and will benefit from. Figure out some stuff you can do on your own and start there. Talk to your wife about what your shared long-term goals are, and see where a more MMM-style lifestyle can get you there. Eventually, some of it will probably click, you just can't expect an overnight transformation (it probably took you a while to get to the point of being able to do this, even if you aren't consciously aware of it).