Falkands War veteran Simon Weston said injured members of the armed forces should be properly compensated as the UK government tries to claw back cash.
He said there was a "duty of honour" to those injured on duty and cutting compensation was "mean spirited".
He said the Ministry of Defence's bid to cut the compensation awarded to two injured soldiers was "penny pinching".
But the MoD says awards should only be paid for original injuries and not subsequent complications.
The former Welsh Guardsman, from Nelson in Caerphilly county, south Wales, was badly injured an Argentinean bomb attack on the British troop ship Sir Galahad.
He spoke as the MoD goes to the Court of Appeal seeking to overturn a ruling that the two soldiers' subsequent health problems during their treatment should not be regarded as separate from their original injuries.
The injured soldiers were initially awarded £9,250 and £8,250 respectively, but they appealed to a tribunal to have those sums increased.
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