The Opposition's blaming Labour's 'soft on crime' approach for an increase in gang members serving home detention.

The number of gang-affiliated offenders sentenced to home detention has risen nearly 60 percent in six years.

Corrections figures show 623 people with gang-links have been put on home detention in the past financial year.

National's justice spokesperson Paul Goldsmith told Kate Hawkesby he wants to make sure there are 'real consequences' for crime.

He says they want to make being a gang member an aggravating factor at sentencing.

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