Its not just the employers, its whole swathes of the industry how it operates and how it treats drivers, for a prime example i give you the typical RDC where the facilities for (in particular visiting) drivers don’t differ greatly from what one might expect to find in a holding cell in some US local jail.
If all i could get was work delvering to the typical supermarket RDC i’d be out of the game too.
The problem with the employers themselves in the hire and reward side in particular is that they’ve based their business model on selling on cost not service…though there are signs in my own sector this is changing to where it should be, where reliable service and quality product/systems are proving more attractive to customers who have found that cheap isn’t necessarily best and promises made when contracts are agreed don’t always equate to product delivered a few years down the line.
The big problem within our industry is found mainly within the large 4 or 5 logistics giants, where they base their treatment/recruitment/training of staff on a doomed to failure policy of one size fits all based on the lowest common denominator, in other words no matter how skilled motivated responsible or proud of their work a driver might be, the army of semi cloned managers assumes them all to be at the same level of the most incompetent fool they, those same managers, foolishly recruited and proved to be as anyone with half an ounce of nous could have told them, but instead of training them up to the level of the best if possible they instead do the same thing every time and try to dumb the job down to the level of the incompetent, this only serves to demoralise and demotivate those who take a pride in their job, you can’t teach a pig to sing.
Now this wouldn’t matter if the managers steeped in logistics management stayed within that sector, but they move on and bring their methods with them.
This policy on large operations of not at least attempting to keep a driver to an allocated vehicle is just one bugbear, some of us look after our vehicles, some others abuse and damage kit spill coffee and leave litter and wouldn’t dream of washing the vehicle or cleaning the inside, operators who do this find their better drivers will leave when they get an equivalent offer but are allocated a vehicle to themselves though sensibly its used by others when they are not on shift which is fair enough…now that might seem a small thing to many but if you are a driver who takes a pride there is nothing more demoralising than being handed a battered scratched uncared for stinking heap (that might only be 6 months old but looks 6 years) and being expected to go out and do your level best, the companies who allocate vehicles tend to be better employers in many ways not just this.
As Conor, above, the good employers in the industry who pay their drivers properly for their skills (in return rightly expect some decent work) and treat them with respect don’t seem to have any trouble filling their vacancies.
Sadly, to be fair, there are too many licence holders out there who can’t get their heads around they have a good job if they have one, can’t look after it and ■■■■■■■■ it up by not giving quality value for money 
, and before you know where you are another good job has bitten the dust and handed over to the green death or some such.