This is more a need for translation help.
I am going to share my analysis about this text.
The prime minister said
[If the supposed profit will not arrive, of course it will have influence on payments.
If it looks like we come to a situation where we cannot bear the payments, we will make adjustment through them (The payments).]
にない=Negative of 似る
給付で調整するしかない= I think で in this case has the meaning of "by means of".
Here is the source: