Controversies over politicians' entitlements and the Centrelink debt recovery system have taken their toll on the Turnbull government, new polling shows.

A Reachtel poll, commissioned by activist group GetUp! and taken before Sussan Ley's resignation and in the midst of ongoing issues surrounding Centrelink's automated debt collection system, found increased support for the opposition, with Labor leading the Turnbull government, 54 points to 46.

While primary support for the Liberal party and Labor was deadlocked at 32 per cent, the opposition captured the majority of the "undecided" support 33.3 per cent to 19.4, with 58.5 per cent of those still making up their mind answering they would preference Labor higher.

The poll, which took in 2126 respondents, focused heavily on the Centrelink issue, which has seen close to 200,000 notices of potential overpayments issued since coming online in July, with many claiming to have been incorrectly found to have owed money.