There is an awful lot of entrenched anti-management 'venom' and illogicality here. May I suggest that you regularly review your arrival (landing) fuel against company minimum, be that CMR or a 'minimium' figure as above. You may be surprised, and may find that your uplifts are - in general - uneccessary. Sure, there will be that one trip when it all goes to pooh, but then, would 15% extra have really been enough? 20%? Why not fill to 16200/21800 (737) EVERY trip, just in case x, y, z? The Classic 737 checklist says do not try the gear up drill with less than 3800kg on board - are you going to plan that as your minimum at the IAF? That is what we are employed for, to try and establish a safe operation, based on what it is reasonable to expect. Forget Contingency - JAROPS allow you to burn that at any time after engine start - eg taxi delays. All we need is a pragmatic approach to uplifting 'extra', thought out and discussed, with justification, with the other crew. not a random figure, like 600kg regardless of weather, time, route etc.
These 'scare stories' of being in dire staights just because you did not uplift 'xxx extra' are ludicrous and not supportable. You always have the diversion option if you are not arriving with minimums. As professionals we have to be capable of managing our fuel states as we flog around the world. There are a lot of posters here, 'journos' or flt simmers - who knows - who do not exhibit this ability.