It is government that has failed, not the Constitution, said Lindiwe Mazibuko, DA parliamentary leader, according to a report on Wednesday.
Speaking during a parliamentary debate about Human Rights Day on Tuesday, she said the "second transition" of the Constitution currently being touted by the ruling ANC was only a smoke screen to cover up poor service delivery.
"What we have today is a progressive Constitution that is becoming a barrier for the increasingly weakening government.
"It is a commonly accepted fact that poor politicians worldwide, who face a drop in support, are eager to tweak their constitutions," Mazibuko reportedly said.
ANC MP John Jeffery argued there was nothing sinister about the ANC's wish to change the Constitution.
He said all data about the differences in prosperity levels between South African population groups pointed to the fact that there were many problems that still had to be rectified.
These wide-ranging issues included everything from infant mortality rates to education results and unemployment statistics.
He said the 17th constitutional amendment, currently tabled before Parliament, was aimed at increasing the powers of the Constitutional Court, rather than curbing them.