Human centred design has been around for a long time in various guises, expecially in the public sector, and especially in delaing with care for people at home.
Ther is also a wealth of examples of case studies and experiments that have happened, and there is a problem here, they all cease; they dont make it to the real world as sustained change.
The main factors in that is that human centred design is opposed to the machine based paradigm that so many leaders and our lolitical leaders aspire to. So, for human centred design to happen int he public sector, those who are leders of those services haev to engage in new ways themsevles. Somehting that is both difficult and it pushes against the prevailing thinking.
It is great that you are making inroads into this.