Australians who do not have children should not be forced to subsidise those who do, according to Liberal Democratic senator David Leyonhjelm, who says he will not support increased childcare rebates.

Senator Leyonhjelm has made the comments as the government is just weeks away from announcing its new families' package.

Having children is a personal choice and shouldn't be subsidised, says David Leyonhjelm. Credit:Peter Braig

The package is expected to include extra support to help middle- and low-income families manage rising childcare costs, and proposals to make it easier to access childcare places.

Senator Leyonhjelm said Australians who did not have children were being increasingly taxed to support the choices of others, something he described as "socialising a personal decision".