Jigger the numbers

[Judge Brybe]

The entire sentence runs:

You can jigger the numbers to make sure that it [personal retirement scheme - J.B.] balancess social security over the long haul.

I understand, 'over the long haul' = in the long run (or 'on the whole'), so there's no trouble here.
As for 'jigger the numbers', does it necessarily have a touch of disapproval? Like monkeying around with numbers or even cooking the books? Trouble is, the speaker I'm quoting from is definitely pro-personal retirement scheme and an outspoken critic of government retirement schemes.

Thanks, y'all

[BobK]

No - there's no disapproval. In Br English we would say 'tweak' or 'twiddle', or 'tinker with' (the with applies only to the last one).. It just means 'make small adjustments up and down unitll you get the result you want'.

b

[BobK]

Afterthought: There's also the word 'jiggle' - same sort of meaning.

b

[Judge Brybe]

Thank you, Sir!