The annual contribution cap and pension transfer ban should be retained in NEST's initial period but it is essential they are both reviewed in 2017, David Yeandle says.
Speaking to IFAonline's sister title Professional Pensions after the publication of the Making Automatic Enrolment Work Review, co-author Yeandle said both of these issues needed to be addressed when thinking about the long term future of pensions.
At present members can contribute up to £3,600 a year and transfers in and out of NEST are not permitted.
He said: "It seems an odd message to be sending - save for your retirement but not more than a certain amount."
Yeandle added while pensions minister Steve Webb had not committed entirely to remove the constraints, the 2017 review was vital.
"Transfers are a big issue. We are moving to a DC world. It would make sense if people we able to bring all their pots together," Yeandle added.
The report said workers move jobs an average of 11 times during their working life and it is difficult and expensive to deal with that many different pension pots.
It added: "Regulation makes moving pensions between one scheme and another very difficult, and few people do so. We believe that for the reforms to be truly effective it will need to be straightforward, indeed the norm, for people to move their pension pot with them as they move employer.
"We believe that government and regulators need to review this issue as a matter of some urgency."
The Reviews's authors also said NEST should be able to receive transfers in and pay transfers out - but only once automatic enrolment is established and the more general issue of pension transfers has been addressed.
Legal & General pensions strategy director and report co-author Adrian Boulding said DC schemes have become more and more similar as the market has developed and it would be sensible to recognise that.
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From 1 March