What do the Government need to do to reduce discontent in the Police?

I know it's a wide ranging question, but reading so many posts about burnout, cancelled rest days, etc, etc is the main issue a simple lack of officers? I know a few years back there was the big fanfare of "we're recruiting 20,000 officers", but by the time they were all employed, a selection didn't last and in that time there was natural wastage with many either retiring or 'getting their numbers' and leaving. I think the net worth of the 20,000 recruits was an actual uptick of approx. 4,000 net total.

So what is truly required to reduce the malcontent felt by the officers. I assume money would be a positive step, but the one thing I read a lot of is 'burnout' and money won't fix that. I would think the main thing to reduce this would be for officers to leave as close to on time as possible, not have rest days cancelled due to being short of staff and a realistic expectation to have annual leave when required (and available).

Given the above, is staffing once more (as it has been since the decimation wrought by Teresa May) the crux of the issue? If so, what is a realistic amount of new officers needed to get some breathing space for the overworked officers?.