lacks, lax

Lacks or lacks may be the plural of "lack", meaning a need, or the absence of something necessary or desirable--
Their eager attitude won't make up for their other lacks.
Platitudes won't make up for the lacks in this plan.

Lacks may also be the third person singular ( he, she, it ) form of "lack", meaning to need or to be missing or without--
This stew lacks something--maybe it needs some salt.
He lacks the means to get back and forth to work, now that he doesn't have a car.
This school lacks discipline.

Lax or lax ( rhymes with lacks ) means loose or weak, as of order or discipline--
The general warned against lax discipline in camp.
The principal's lax enforcement of rules is causing something close to mayhem.
This school has a lax disciplinary policy.

Now that you know that, you can say--
"The supervisor lacks confidence in the system, and his enforcement or the rules is lax."

Note--"LAX" ( all capitals ) is the abbreviation or code for Los Angeles airport--
I saw a tag on my luggage that said LAX, but I'm going to New York!