My old cynic, grumpy mind can't see this as anything but virtue signaling. I would be overjoyed to be wrong.
One corner stone of the EU is the 4 freedoms[0] that among other things denies public institutions the ability to look at anything besides the monetary cost when deciding who to contract for anything.
And as JIT[1] no longer only applies to goods but also to people noone has people working for them anymore, but contract everything out.
Obviously I haven't read the report/document so maybe there are some political steps that the signees are binding themselves to take towards a non-growth-at-all-cost system but I really doubt it.
-----