Rent-controls began in New York City as a temporary emergency response to the Second World War.
Agriculture subsidies likewise were intended to be a temporary fix.
Back when it was newly built the parking fee at War Memorial Colesium (of twenty-five cents) was only going to last until it paid for the cost of paving the lot.
And how about that temporary 1% restaurant tax ten or so years ago that was going to go away just as soon as it paid for the convention center expansion of the Colesium (not the roof raising)?
When some politician says a tax or program is going to be temporary the only thing you can be certain of is that they are lying. Once they get that money coming in it takes a major effort to detox their system.