[krschultz]

If we all switched to it, wouldn't it simplify all of those things?

Right now if you get paid every other week, you get paid 3 times in 2 months and twice in all the other months.

If you get paid twice a month on the 15th and last day of the month, payroll constantly has to take account of holidays and weekends because the day of the week is always fluctuating.

All of those things would have to change, but they would be simpler after the change. It's the same argument as switching to the metric system in the US. Unfortunately the fixed cost of having to switch outweighs the benefits of switching (certainly for the calendar, less so for metric).