Have to be very careful, as I don't know what words trigger the autocensors on here.
Mr Mega-Donor is based in Thailand.
He is the largest shareholder in a company whose product is a particular cryptocurrency - lets call is Wether.
Wether is not widely used in the UK - but is used by people in Russia to evade sanctions and fund its military.
Wether is increasingly focusing its business in Russia, and has recently applied for a trademark there.
A CGT cut does not have any obvious benefit to Mr Mega-Donor, because neither he nor Wether are UK based.
A CGT cut does benefit UK based persons - say, Mr F, who might now have, or being intending to make, cryptocurrency.
We know that Russia has form when it comes to "exchange of money for favour" with persons (at least, a person) involved in a certain political party.
Mr F seems relatively fond of Russia, in terms of public statements, too.