Re: Suggestions?
American Economist Henry George figured it all out a century ago - all taxation as Land Value Tax.
If people in the UK want to use the free ad supported social network service created by Facebook with their Californian workforce rather a (fictional) UK social network 'Teabook'... then so be it. If facebook and their advertisers can avoid using any UK land to supply their goods and services, then those services will be cheaper than local ones using UK land. But those cheaper savings will be passed on to UK consumers... assuming Facebook and their advertisers do not have monopoly powers.