Fundamentally, he's arguing that people should be compensated to allow them to reach the same standard of living as would have been possible in the absence of civilization and proposing a subsidy in the region of £1000 per annum in today's sterling to compensate. That's far closer to the Alaska Permanent Fund in both ideological underpinnings and magnitude than it is to being an adequate welfare state replacement[1]. Of course, we could speculate that he'd advocate a much higher subsidy in today's land of relative plenty, but his 1797 argument is quite explicit in suggesting that people are owed no more than the value of the life they could have enjoyed in a Native American "state of nature" and the landed classes owe no more than that.
Fortunately today we have new arguments for the economic benefits of universal education and necessity of unemployment insurance in an economy managed to ensure some level of involuntary unemployment persists.
[1]£1k per year for Paine's average 30 year adult remaining lifespan plus £1.5k at 21 is less than my government's investment in my education...