Waive the two child cap on tax credits for mothers working minimum 18 hours/week

The Government deems third babies a luxury not every family has earned, though the royal’s third baby will be taken care of, courtesy of the TAXPAYER (who's being penalised the same as those who do not work at all).
As long as a woman is in paid work, she should be able to receive tax credit support.
For each child conceived, I believe 6 hours of work is ideal - e.g: 18 hours for 3 children, 24 hours for 4 children, 30 hours for 5 children.
A cap on 5 children (with the exception of one multiple birth of twins) is fair.
If a working mother falls ill or disabled as an unforseeable result, I believe her claim for tax credits should continue. However, a cap should be placed on any children following her illness, unless she is able to return back to work.