Complex sentence: Employers may use wage premiums to discourage goofing off by their employees, although it is suggested that the effects of such incentives causes aging to have a negative effect upon earnings sooner than would be otherwise expected.
Split into simpler sentences: Employers may use wage premiums to discourage goofing off by their employees. It is suggested that the effects of such incentives causes aging to have a negative effect upon earnings sooner than would be otherwise expected.