You can hear the 'thwack' from here:
"Sir, Darrell Issa (“Obama’s Keynesian failures must never be repeated”, Comment, February 8) repeats the common fallacy that stimulus packages amount to “little more than an exercise in the redistribution of wealth from our grandchildren to today’s special interest groups”, an echo of our prime minister’s oft-repeated (and similarly fallacious) assertion that the fiscal deficit is “a burden on our children”. If government borrowing were indeed a burden, then real per capita income of future citizens would be reduced.
But where there is borrowing there is lending, so that payments of interest and repayments of capital that may result from stimulus packages are from taxpayers to lenders – no loss of real income there, just a transfer payment."
via FT.com / Comment / Letters - ‘Burden on our grandchildren’ is ambiguous talk.