When a salaried worker receives a bonus, either in cash or shares, they are obliged to pay tax on the payment at their marginal rate.

Two jackets a month meant as much money as an average salaried worker.

The sooner we accept this, the sooner we can put rules in place that treat them like other salaried workers.

A spokesman said the party has just four full-time paid campaign staff, compared with about 100 salaried workers on each of their rivals' campaigns.

To cover 65 percent of salaried workers today, the income threshold would need to be increased to $1,327 (around $69,000 a year).