Rixuyo [any]
You should read Revolutionary Strategy by Mike Macnair that goes into this topic.
The SP is dead, in a leftist sense. The last struggle happened from the Summer of 2020 till the end of 2021. That struggle was necessary, but ultimately the fight for power over the party was lost. All marxists/communists are in ROOD or in the Socialisten (Socialists) working groups / local parties. Only a handful of unorganized communists remain in the SP. Others that have left already before the 2020-2021 struggle, fled to the Animal Party or Bij1.
Source: I’m a member of Communist Platform, with a decade of daily experience with the SP, and now active in one of the Socialisten groups.
This is my go to argument that is easy to understand for most people. Labour cost is not 100% of the total costs, so a $1 increase in salary will not result in a $1 price increase but at most, let’s say, $0.50. This means that a salary increase will always improve purchasing power, as the salary relative to the product price changed in favour of the worker, despite any smaller product price increase.
Counter point: pasta straw