With plumbers, electricians and car mechanics charging at least $100+ per hour who could quibble over a LAME charging 1 or 1.5 this rate given the difficulty of maintaining their licence and the liability they have.
Surely what should be the bigger concern is the inflated number of hours billed to some very simple jobs. On some basic aircraft I've been astonished at how they allocate excessive hours to jobs that obviously actually take a fraction of that time.
For an annual on a simple VFR single I'd rather see the actual number of hours done to the job and a $1000 issue fee for the MR instead of an imaginary extra 10 hours.
OOW