However, a mind trick wasn't the best option if Charlie wanted control over Esteban—the man was a governor serving the Qing Eliminating Society and therefore close to their inner circle, if not having personal contact with Fleur.
It was therefore likely Fleur would send an elder or some confidante to inspect Esteban at a moment's notice, and the mind trick could very much be noticed.
That was why he needed Esteban to be his willing slave.
Naturally, bribery or threats wouldn't work in that re