In my experience, while the Republicans appear to want growth, the party insiders only want growth in terms of voters and contributions, not in terms of candidates and leaders. It is a serious old boy club, and the only way to rise in the party is to have the right family, come from the right neighborhood/city/schools, and have the right people in your corner. When I tried to run for judge in Central Ohio, I was told by some senior party members I went to the wrong law school, and didn't have the right legacy to be a candidate for the party. It's attitudes like that which will drive away young people, and the party will die of attrition.