There's definitely elements of that - but part of that is that many pensions are based on the two highest earning years of your career, so it's "common" among cops when they are planning to retire to spend two years working every possible piece of OT available, to maximize their pension income.
Mind you, in the UK, defined benefits pension schemes are very rare nowadays, but where they exist they are defined as a percentage of the final year salary with that company, so the highest 2 year thing seems a bit weird to me but for a different reason.
But then you don't get to go on stage with a chainsaw and bragging about how you're downsizing government.
Some state prisons have escaped the overtime pit by offering huge sign-on bonuses and doing a hiring surge. But it takes longer to train ATC than a CO.
Unfortunately, this is now priced into certain government jobs in the USA and people rely on it. Americans see the obscene amounts of money and hours as a challenge until they actually burn out.
ATC isn't even the worst offender. Law enforcement and prison guards can pull 100+ hours a week on a regular basis. This is how prison guards can pull $400k/year.