Well, there's a general election around the corner, op, and the Tories are desperate to cling on to power - did you seriously expect any different from them? They have form for the Great Pre Election Taxation Reduction Bribary. So yabu to expect any different.
To be serious for a moment though, the easiest taxes to reduce are the most visible ones - NI and income tax. When those get reduced, the electorate notice it, and sometimes vote accordingly. Add the cost of living crisis, and on the face of it, it's a really welcome relief.
Only when they need the NHS or education, or other public services, will they realise how short sighted it is. Tories are amazing at stealth taxes. Look up local council tax gearing effect. Since 2010 they've systematically reduced central funding for local authorities, with the result that council tax levy has increased and the public picks up the bill through increased local taxation. The LA gets the blame, the government largely gets away with it because they can blame the LAs for not spending money wisely enough. Fewer NHS dentists? Denplan. That's enforced privatisation - another form of taxation, except it's 'optional'. But if you don't pay it, and you can't find an NHS dentist then you're fucked. Fewer police? Raise council tax.
NI contributions pay for the state pension of course. But cuts won't affect today's pensioners (who are more traditionally, born out with statistics, Conservative voters), it will affect those who need a state pension in a few decades. So the can is kicked down the road in favour of a quick fix today, in the Great Pre Election Tax Reduction Bribary.