I asked exactly the same question to my Thai wifey, she replied there is little stigma in Isaan Thailand regarding younger gals hooking up with older guys especially farangs who are well known to look after and respect them irrespective of their previous job.
With regards to GF's and wives ''playing the long game'' just how long is the long game ? we've been together for 17 years since marriage and life is wonderful, well for me it is lol and i have no reason to think that wifey feels any different.
By the way wifey was 24yo and i 55yo when we met.