One plausible scenario is that they open gradually over the period ahead, especially for workers with skills that are in short supply. This would relieve some of the current pressure points in the labour market.
Alternatively, it is also possible that the borders remain closed for an extended period and  7/8/2021  The Labour Market and Monetary Policy | Speeches | RBA  that the pressure points build further. If so, aggregate wages growth would pick up more quickly than currently expected, but production and investment would be also be constrained.