A little unintuitive if the employer is paying the office worker more than the remote worker. It's cheaper for the employer if they don't have to pay for offices, pay those electric bills, hire the janitorial staff, etc.

I suppose the higher pay reflects the employer's expectation of a higher return on productivity, creativity, from that employee.

Or, put another way, they are docking the pay of the remote worker expecting that they are probably not clocking in a "full days work" or will fail to deliver on the fruits of collaboration....