Adelaide police have been caught red-faced after it was revealed a senior officer offered Myer vouchers to colleagues to fine more drivers.

In their sights were drivers using mobile phones during Operation Fatal Distraction.

Watch the video above.

It comes just a month after fines for mobile phone use while driving jumped to $600.

7NEWS has discovered that a senior officer offered $30 Myer vouchers to those who made the greatest contribution to road safety by fining drivers.

It is understood that an officer would earn four points for a fine and one point for a caution.

But South Australian Police Commissioner Grant Stevens was unimpressed when he found out about the scheme.

Chevron Right Icon 'That's not what we do.'

"As soon as we heard about it, we shut it down and made sure our people understand that's not what we do," he said.

"They have discretion to make a decision about whether they issue a fine or give a warning, arrest or report that person."

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The commissioner insists quotas for police do not exist, although there are benchmarks for driver interactions.

However of the 155,000 "expiations" (fines) issued in the past year, almost half were cautions.

Stevens says a formal review of the incentive system is now underway but won't say if the officer involved will be disciplined.

Meanwhile, police spokespeople in Melbourne, Brisbane, Perth and Sydney say no such incentive exists in those states.

For more Adelaide news, click here.