Outliers of all types are looked for. If someone bought a (let's say) $5m house, they would also be an outlier. If they were deeply in debt, they would be an outlier (and very suspicious because they could be very open for bribery, and consequently blackmail). Keeping things quiet is deemed worse (for instance, if you are open about being gay, and everyone knows, it is OK, but if you are very secretive about it, you may again be easily blackmailed).
If you work in an area that requires a high security clearance, you should know you have no privacy, and that everything could be of concern - and just live with it. If you can't, you shouldn't work in that type of job.