Implies the boss of a job once did exceptionally, but their ability to lead/direct a team of employees has deteriorated overtime and refuses to quit or accept that changes need to be made, or are afraid to do so.
They may still be effective at their own work, but they cannot realize that their business/team is underperforming and are no longer able to shift the situation in their favor.
"How's work been?"
"My broken boss won't bring more staff on, he keeps filling reservations but there's no one to help."
In the US, an employer is required to pay an employee for ones's time on the job, and may only be withheld up to 30 days. To some, this means signing onto a job, working for a limited amount of time, demanding for their paycheck, and leaving.
This reflects an incompetent hiring process and lowers morale.
In some cases, they will call and/or come in, asking if they can/will receive their paycheck on payday.
A Wonder Check is called such because it leads others to wonder how they earned it in the first place, and wonder why they left at all.
"A Janice called, and left her name and number."
"What did she need?"
"She asked if she could grab her paycheck Friday, but I don't ever remember seeing her here before."
"Oh yeah, she worked here for a day and never came back."
"I see, she just wanted her Wonder Check. Glad she stopped me from doing my job to ask about her nickels and pennies."