Bartosz Grodecki, appointed by President Karol Nawrocki earlier the same day, posted his reservations on X shortly after defence and finance ministers, alongside EU commissioners for budget and defence, signed the SAFE loan agreement.
Under the deal, Poland stands to receive up to EUR 43.7 billion in low-interest loans for defence spending.
It was the first of 19 participating countries to have its agreement signed, ahead of Lithuania.
Prime Minister Donald Tusk hailed the deal as a defining moment, saying Poland would use the funds to strengthen its military and defence industry.
"Poland will be safer in these difficult and risky times," he told a press conference.
Grodecki said the 45-year loan, taken out in a foreign currency, risked being "politically blocked by external institutions" while Poland would remain legally obliged to repay the debt.
He also said the interest rate had not been confirmed.
He argued that Poland's security "must be built on the strength of its own state, its own economy and its own decisions", warning that "sovereignty on credit is not true sovereignty".
As an alternative, Grodecki backed a proposal by President Nawrocki, an ally of the opposition Law and Justice (PiS) party, for a domestic defence funding model – dubbed "Polish SAFE 0%" – based on national capital, the National Bank of Poland and full state control.
(ał)
Source: PAP