Marcial Boo, chief executive of the Independent Parliamentary Standards Authority (IPSA), said MPs did an important job and should not be paid a "miserly amount".
Their pay will go up from 67,000 pounds to 74,000 pounds under IPSA'S plan.
The country's Conservative, Liberal Democrat and Labour party leaders have argued it would be wrong when public sector pay rises were capped at 1 per cent.
The proposed 74,000 pounds figure was now seen by some as being "at the low end", he claimed, adding that pay needed to be fair to attract good candidates.
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"They are there to represent us all -- to form laws, to send young people to war," he told the newspaper.
"It is not an easy thing to do. We want to have good people doing the job and they need to be paid fairly. Now, that's not paid in excess but it's not being paid a miserly amount either," he added.
The watchdog has indicated it will conduct one further review of the pay rise after the election -- as it is legally obliged to do.
But a spokesperson said the authority was likely to "crack on" with the planned pay rise after the 2015 general election.
The one-off increase is part of a package that will see MPs pay more into their pensions, as well as the end of resettlement payments.
IPSA says that overall the reforms will not cost taxpayers any more than the present scheme.