This is Myanmar military trying to do field work for China. China is the one who allowed these militias to thrive in the border areas and they have been arming them for decades. This particular operation happens in Myawaddy, which is in lower eastern part of Myanmar close to Thailand, but not in northeastern Myanmar closer to China, because Myanmar military dare only touch the militia there. It helps that the accused collaborators of these scam centers in the lower east part of Myanmar are Kayin ethnic militia, who--unlike Wa or Kokang--aren't as Chinese, and thus, China doesn't care. Also, China is now 100% backing the military regime (which staged a coup around 2021) in Myanmar, so this is like shooting two birds with one stone (i.e., get rid of scam centers for China, while helping Myanmar's brutal military to remove an income source of one of the non-ethnically Chinese militia).
The military dares not assault the northeastern militias like Wa [ https://en.wikipedia.org/wiki/United_Wa_State_Army ], Kokang militia [ https://en.wikipedia.org/wiki/Myanmar_National_Democratic_Al... ] because these guys are truly backed (and enabled) by China. There was a raid by Myanmar military in northeastern part (close to China) about a year ago [ https://www.rfa.org/english/myanmar/2024/11/20/shan-state-wa... ] and that was backed by China. Otherwise, Myanmar military dares not do that.
Basically, China is getting what it sowed and now that its citizens are being impacted, it's asking its lapdog, Burmese military, to do the clean-up for them selectively.