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Have other companies that have beneficial tax rates or benefits and agree commercial terms with them. Not unlike Trump using his own hotels to stay at as part of the presidency, the money didn't go directly into his pocket but it will end up there one way or the other.
Or say somewhere like Singapore that has really low tax rates, so Company A pays Singapore Company B for services. Person A takes money out of Company B. Company A now has reduced profit, so pays less corporation tax, while Person A gets their money at a reduced tax rate, meanwhile, it doesn't look like Person A has taken money from Company A, etc.
Stuff like this happens all the while, kickbacks can be similar. Or say you hire building firm A to do some work for your company at a high rate, and in exchange he does work on your house at a low rate.
Like I said, I've no idea what Lai does, I'm just saying that having his West Brom Company pay dividends or big wages won't be the only way to move cash around to his benefit if he wanted to.