PM Lee noted that the arrangement turned out to be successful.
Mr Baey pointed out that the authorities can't take enforcement actions against litterbugs that they can't identify.
The vouchers will be valid from 15 Apr 2024 to 31 Dec 2027.
One teacher's photo was circulated online, with a racial slur in the caption.
The eventual goal is a retirement age of 65 by 2030.
He must pay an extra cash bail of S$500,000.
The cash had Taylor Swift's face instead of Mr Yusof Ishak's.
"Good to know even Taylor Swift’s hair cannot survive Singapore’s humidity," said one TikTok user.
Employees in the financial services sector must earn at least S$6,200 a month.
The revenue from the concerts also go back to "highly impactful social events", he said.