To say landlords are lazy and greedy would be a dramatic understatement. It's partly due to how easy money is to come by once you have a property, but mostly due to an odd superiority complex they develop.
Saying that, the current job of letting a property is tedious (at best). Agreements, references, deposits, prescribed information, inventories, standing orders, possession notices and keys. Everyone always forgets the importance of keys. Especially spare sets.
There's been little pockets of innovation around the admin process, but no-one has yet 'nailed it'.
Victoria Whitlock's description of the OpenRent 'Rent Now' service, however, seems close to perfect. Takes on the hard work, keeps in communication with the landlord and even charges the tenants for the landlord to feel secure (albeit less than most other agencies).
It's worth noting that movebubble.com offer an agreement generation and signing service, which doesn't yet include the standard referencing bits, but replaces them with movebubble specific profiles.
Rentify.co.uk also offers an agreement generation service to landlords for free, with other services like referencing and deposit protection for an added fee.
Check out the Accidental Landlord's Evening Standard write up here: