Just adding 10 knots to everything will not only get the companies safety department on your behind very fast indeed (in fact, you will bust your line release check), but the authority as well as it can and will breach the certified performance for a plane.
And quite a lot of extra every single flight will in some companies get you fired very soon and in others get you into another week of fuel saving training nowadays. Remember, FOQA catches everything you do on board and all the rest is put into computers as well and will be noticed.
And by the way, what is TRW?