How about you and i meeting outside the Hacienda office in Alicante and giving ourselves up? We might as well, I can’t think of a way round this declaring foreign assets nonsense.
That’s easy just declare your world wide assets to the Hacienda and pay the tax. There is a difference between legal avoidance and breaking the laws of the country. Bribes and tax evasion are not considered crimes in Spain by most people. They are.