It should be voluntary but shops, hospitals, malls, cinemas etc should be allowed to require them. When I lived in Japan decades ago masks were common and China even before covid.
This is described in a book by Christopher Moore - these abject characters covered in human excrement stinking and coming to the surface on Sukhumvit. I found the books by Moore to be very informative regarding Thai language and idiom but also very useful for learning about Thai culture, social mores and values. Colin Piprell was good too and John Burdett.
That aside I'm sure people think that convicts in Europe should do similar tasks. In the USA convict labour is very common and sometimes is regarded as an extension of the slave system. as described by JL Burke in his Robicheaux series. The pitiful thing is these sewage workers are in prison for minor crimes of non violence. The most famous prison laborer was probably Oscar Wild damaged by picking Oakam