I think people have different connotations for the word wealth. For some that means people being able to afford housing, Healthcare, or taking a day off to spend with their children.
I think it is simply wrong on the facts that the national government has been primarily focused on raising national GDP and material well-being, or that it has done a good job.
The topic of growth is almost absent from campaign messaging, and investment in infrastructure for the future is a minuscule part of budgets.
If economic growth was the priority, we would see streamlined code and legislation throughout the country and focus on improving them. Politicians would be spending their time trying to figure out how to lower the costs of High-Speed Rail or Bridges or houses.