"Manipulation" (which is basically what this is) can easily backfire.
I had an employer who used to effectively *dare* me to prove a point. Or, disprove *his* point. I'd invest a fair bit of effort throwing something together -- much to his delight. He could refine his ideas quickly (and empirically) at my expense.
Then, ONE *DAY* (i.e., step function), I just shrugged my shoulders (stopped playing the game). Suddenly, he'd lost that leverage. And, because he had relied on its DISHONESTY, he no longer had any effective way of motivating me to take on those challenges responsibly.
He won, in the short term, and lost in the long run...
I think honest and aboveboard approaches prove to be more effective, in the long run. Respect for each other, etc.
E.g., you have a project manager with an $X budget (for supplies, services, etc.)? Have him plan ROUGHLY what the cash flow needs to be. Then, push the planned amount of cash into a checking/prepaid CC account monthly (giving you some ability to monitor it without MICROmanaging it!) and let the project manager spend it as he sees fit! (knowing that he will have to account for his choices, later). I.e., you trust him with making decisions that will largely influence the success of the project (and the resources you've invested in it!), yet you won't trust him with what is often a *small* amount of CASH?? (tens of $K) Where's the logic in that? Why do you/finance need to get involved in all those decisions when *he* is ultimately responsible for the project's success?
Only a cretin wouldn't understand the need for a company to make money to survive. To "produce". etc. And, it doesn't take a rocket scientist to sort out what role each player *should* (in theory) be playing in that process. "This is your job because THIS IS YOUR JOB!" (not because I'm tricking you into performing it, etc.)
I've been told that, in some workplaces, employers have to *coddle* employees! Effectively *thank* them for coming to work "on time"... (WTF??) [note that I'm not talking about prima donna's but, rather, average joe's!]
(sigh)