Because you're probably come from a high trust culture where you've been taught reciprocal trust, responsibility and accountability, but there's people coming from low trust environments where exploiting loopholes and scamming everyone outside their inner circle is the norm, and it's the way they learned to get ahead in life, from school all the way to work and business.
They're brazen because they've never been caught or suffered consequences for their actions.
This isn't something you can screen for in a classic job interview.
I know there's some evidence of Chinese people working at big tech and feeding data back to the CCP but is this a "low trust culture" issue in general or an extrapolation of that one pattern?
For an adult, I would attribute this more to internal mental makeup than anything else. I've seen individuals exhibit these positive and negative behaviors irrespective of whether they were in a high-trust society or a low-trust one, a wealthy society or a poverty-riddled one.
Additionally, based on what's going on in the world, I would say that there are very clear signs that a high-trust society is formed when adults with positive behaviors are in power, and a low-trust society is formed when adults with negative behaviors gain power.
Indubitably, there are individuals whose behaviors are moderated by what type of society they're in, but that split between moderated individuals and self-driven individuals is, IMHO, unknown, or at least, unknown to me.
That is just a long sentence for "us" vs "those people".
Having said that I don't entirely deny the effect of society on people's behavior. But at the same time, I have seen people from so called high-trust society being all polished and nice on the surface while being assholes and people from so called low-trust society being genuinely decent people despite not having the right name or the surface polish.
Also, assholes tend to attract assholes and people of the same tribe/clan/race tend to form groups.
Why not? Sounds not that hard. I actually believe this is something that would make a candidate looks good in an interview for many large corporations.
Because people lie?
It is in fact very easy to scan for.