Sure. We've considered the provincial legislatures.
Some of them will make no deductions to the allowance of members. In those cases, any absence does not result in a deduction. Others will have categories that are open-ended, like leave of the speaker, notice to the speaker, or extraordinary family circumstances or personal situations. Those could be covered. Some are explicit—maternity, parental—and some aren't.
In the U.K., there are no deductions, but they've put in place, on a pilot project, a system of proxy voting. They've also considered the impact on the House itself.