Not so much as going soft, but protection against insurance claims and workers comp. Our policies and procedures at work have been restructured on Manual Handling. (A few years ago now though).
I don't think the advisory standards (or codes of practice now) actually specify a maximum weight to lift, as there are different factors involved in assessing the risk. Identifying a range of issues with respect to the load provides an outcome for lifting a load or not. Generally, you assess the load as you do the work. i.e. frequency and lifting duration, the distance the laod has to be lifted and moved, the centre of gravity, load size and composition, etc, etc, not mentioning the variance in lifters (i.e. male / female, etc)
The amount of paperwork we need to write in our method statement, Job safety analysis sheets, work activity briefing sheets, Inspection and Test plans and relevant safety checklists is pretty alarming. Supervisors on site need a bloody filing cabinet in the back of their truck just to keep up with the paperwork.
And this, to some extent, should protect the worker during work, and also the contractor against any impending law suit.
F