This is true, however the whole point of a security deposit is to prevent the landlord with security cash in case the tenant does something to the property that involves needing cash for repair/replacement. So unfortunately this which I acknowledge is true:
Normally, they expect to get money from deposits, by fair means or foul.
^ is fundamentally immoral. Letting agents should be making their money from fees they charge their clients, and that is it. "Fair means" or "foul means" still involves the letting agents helping themselves to a chunk of a security deposit, as any money taken from the security deposit is supposed to pay for the repairs/replacements. Why they think they are entitled to a profit I have no idea, and they have NO RIGHT WHATSOEVER to take anything on top of what it costs to restore the actual property. Any admin fees incurred in doing so would be covered by the slice of the weekly rent they will be getting off the landlord.
Unfortunately we as a society have allowed this embezzling to happen for far too long so letting agents now think they are entitled to what they regard as "casual embezzlement".
It is becoming more and more clear to me that this is and has been happening on a national scale. Watchdog time?
I mean sure they're allowed to be creative, but what really makes me laugh is the fact that they instantly introduce this compulsory added admin fee when the government toughens up its laws on illegal deposit embezzling, i.e. In order to maintain the same profit levels, they are pretty blatantly admitting to the public that they need to replace all the money they've been illegally receiving all this time with something different but legal; now that the DPS has ruined their scamming activities.
E.g:
So lets say the security deposit they initially were going to let you use was £500, but since DPS was introduced they have a new fixed non-refundable admin fee of £250 for the same property, which previously was £0. That's like saying "yeah we used to illegally take 50% of every deposit before the DPS came in, but now we have to make up for it by just demanding the same money off the tenant at the beginning"