My husband is very similar to yours. He has always liked nice things and tries to keep up with what others have. He actually grew up in a frugal household, which has served his parents very well now that they are retired. However, he always thought that because of that, his friends had nicer toys, went on better vacations, etc. Although he is starting to listen to some of my views, it is still like pulling teeth and we still get into arguments at times when I mention early retirement.
One difference is that I am the breadwinner in the family, by about 2.5-3x. It gets pretty annoying when I work hard for my (ok, our) money and he wants to spend on things that are overly extravagant. In the last two years that I have made my current salary, I am embarrassed to say we only saved 1/3 of our income. It was my fault for not keeping an eye on our finances as well as I usually do. I am hoping to save about 2/3 of our net income this year, but we are not deprived or mustachians by any means. We have a very nice house (6 bedrooms, but the girls still share a room) in a very nice neighborhood and our kids live a lifestyle that I could have only dreamed of as a kid. But alas, my husband feels that we still don't have "enough".
I have started to talk to him more about why this is important to me. Having adequate savings means security to me. I didn't have much financial security growing up. Having enough to retire early means we can spend more time together to travel, be with the kids, exercise more, and to do whatever we want to do. I explained to him that I am doing this for US and for our kids. It's not something I am doing just for myself. We are the typical two income family who make good earnings, but also spend a ton on child care, food, and pay people to do things for us since we don't have time to do it ourselves. We have the money, but no time to vacation. I want to be able to slow our lives down so that we can enjoy each other and our kids. I want to be able to relax and smell the roses along the way. I have told him that I am not going to work and stress about work until I am 65 so that we can support an extravagant lifestyle that match our neighbors. I pretty told him my plans of RE in 7 years. If he feels that he would like to spend more than we are now, it just means that he will have to work longer in the end. At this point, he know it's what I want and he can decide what he wishes to do, which will directly impact when he will be able to retire.
So, I guess for your situation, I would make it known why it is important to you. How will increasing savings rate impact your family? Explain to him what RE would mean for your kids, lifestyle and your relationship. He may choose to spend more and work until he is not able to anymore. In the end, you can only let him know what your desires and views are, but it's hard to force personal values on someone.