What if they extended it so that all residents must pay it, wether they want to use or not public transport? This way, they can reduce the price even more and everybody can hop in a public transport anytime they want without thinking.
Technically, every tax payer does pay, irrespective of whether they are using the ticket or not: the EUR 49/month ticket is heavily subsidised, to the tune of EUR 3 billion/year, and this is covered by the tax payer.