Reckon in the years to come, the UK will look closely at the U.S tax model.
U.S Tax.png
As the HMRC develop/fine tune their I.T/A.I. systems, all aspects of income and outgoings will be monitored to an Nth degree. Self assessment will only be part of the changes. Already, the State Pension is under pressure and is likely to be phased out and the onus put on the individual and their employer, to pay into a future pension scheme.
Gambling could easily be swept up into the mix too. The affordability checks are already starting to impact deposits/withdrawals, which can be picked up by HMRC systems as of now. If the self assessment was in place and someone declared heavy gambling losses to offset other income, there will likely be allowance limits put in place to avoid fraud. Even pressure put on the bookmaker licence for allowing said losses.
The video mentioned crypto, that'll be a doozy. Don't forget the HMRC can back-date claims against anyone they think has previously profited and not declared. That includes any crypto used on black market sites and poker games...etc.
There's also a law going through whereby the HMRC/DWP can take money from your bank account, at any time, for any reason. Can see that being a shit show when that actually happens.
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