New medicare levy

Use a different way to calculate medicare levy.

new_medicare_levy(parameter_table)

Arguments

parameter_table

parameter_table	A `data.table` containing `switches` The value in a row specifying which different medicare function is to apply. `lower_threshold` What is the lower medicare threshold, below which no medicare levy is applied, above which a tapering rate applies. `taper` What is the taper above `lower_threshold`. `rate` The medicare levy applicable above the medicare thresholds. `lower_up_for_each_child` How much the lower threshold should increase with each `n_dependants`. `lower_family_threshold` The threshold as applied to families (i.e. couples)

A data.table containing

switches: The value in a row specifying which different medicare function is to apply.
lower_threshold: What is the lower medicare threshold, below which no medicare levy is applied, above which a tapering rate applies.
taper: What is the taper above lower_threshold.
rate: The medicare levy applicable above the medicare thresholds.
lower_up_for_each_child: How much the lower threshold should increase with each n_dependants.
lower_family_threshold: The threshold as applied to families (i.e. couples)

A function similar to medicare_levy.