they would do that to kill Bitcoin by monopolising it and snuffling it out. Then they use their currency, existing Fiat or new weak Centralised cypto, to keep control of the means in which work is paid for.  This preserves the wealth of historic cumulative property (Intellectual Property, Company shares, Govt expense flows for defence, Buildings,etc) owners as the Property owners pay for the work in low value currency. See other posts on Money supply.

If workers are paid in BTC, it spreads the wealth around as workers will receive pay in something understandable (21m) real value.