Take in mind also that you need to advance the VAT to the government each three months. Including money that could be still unpaid to you (or worse, that will never be paid because some big clients can blackmail small companies easily in that sense). This is a problem for a small company that is thus forced to eat the loses and lend a money to the government, even if they do not really have this money. Is bassically sucking money from the people that create and maintain jobs.
Anyway, the VAT is more likely to go up than down, given that it is not high relative to other European countries.
[#] edit: assuming "you" have relatively high income, of course, which I think would be the case for the OP (median salary is below 20k).
Europe can raise the VAT as many as they want. They are only shooting themselves in the foot, damaging the growth expectatives of the european companies and carefully nurturing the anti-european parties.
Is the income tax not progressive in Spain then? Everyone pays the same marginal tax rate?
I'm not sure what kind of virtue signalling is that, but I highly doubt that the problem they try to solve with VAT is "how can we tax children and elder people?" and more like "how can we collect more tax to build a fairer society based on our social democratic point of view? So we can cover also services for people not paying income tax."
I would really urge you to refrain from being that cynical :) it will only make you sour.