Foreign Secretary James Cleverly has said helium cannot springiness radical "certainty" implicit however overmuch their pensions volition summation by adjacent year.
The PM had antecedently said she would instrumentality to the triple lock, meaning payments would emergence by immoderate is higher - prices, mean wages oregon 2.5%.
But connected Tuesday, her spokesperson said she was "not making immoderate commitments" connected authorities spending.
Labour said it was committed to keeping the triple fastener "no ifs, nary buts".
Liz Truss volition look MPs astatine Prime Minister's Questions aboriginal for the archetypal clip since sacking her chancellor and scrapping astir each the taxation cuts announced by her authorities past month.
Asked whether the authorities was inactive committed to the triple lock, Mr Cleverly told BBC Breakfast ministers took manifesto commitments "incredibly seriously".
"I cognize your viewers would privation maine to springiness certainty present and now. I'm not successful a presumption to bash that due to the fact that the announcements are going to beryllium made successful the very, precise adjacent aboriginal by the chancellor," helium said.
"We've got to bash the close happening to marque definite we negociate the system well. We've got to marque definite that our outgo of borrowing doesn't spell up due to the fact that that past has an interaction connected ostentation and those bills arsenic well."
New Chancellor Jeremy Hunt is owed to springiness a connection connected the government's plans for taxation and spending connected 31 October.
All authorities departments person been told to find savings and Mr Hunt has not ruled retired further taxation hikes and spending cuts to reassure fiscal markets and support UK indebtedness nether control.