How to get a Patent Scrutinizer

Fallen London's economy has changed somewhat, but Menaces continue to be the negative (but still interesting!) consequence of failure. If your only storylets have a high rate of failure, it may be a sign that you've attempted to advance too quickly, and the Menaces are a natural check against speed runs.

With that in mind, Social Actions really are your best insurance against Menaces while throwing everything you've got against storylets. While there are some in-game ways to relieve yourself of some of the pressure of Menaces, they aren't as reliable as Social Actions. This is definitely an intended feature, since it draws more players in to play Fallen London and increases income overall.

"Thou shalt not muzzle the ox that treadeth out the corn.", is a profession related storylet that becomes available as part of you receiving An Earnest of Payment.

Every week, you will receive An Earnest of Payment, which you can then turn in for the reward specific to your profession. You also receive Professional Perks, which give generic rewards available for any profession.

You should probably use your Earnest of Payment as soon as you get it, as its rewards can really help push you forward in your Qualities. And while I haven't checked myself, I think that you could safely let your Earnests of Payment stack up, It seems like you can only have one Earnest of Payment at a time and they can't stack, though there wouldn't be a point anyway, as An Earnest of Payment has no use outside of the "Thou shalt not muzzle the ox that treadeth out the corn." Storylet.

Source: http://echobazaar.wikidot.com/profession