The forest fuel management problem is at three governmental levels.
The Feds would rather not, so to speak, but if a brush clearing project is proposed, getting it approved and starting work can take 3-5 years.
The State would rather not, unless ass-kicked into doing it.
Counties' awareness of the problem and potential preventive measures varies, and LA County seems to have a great deal of cluelessness at upper decision-making levels.
If a property owner does much, they will likely find themselves the target of the angry bureaucrats of the pertinent governmental agencies. In the case of the LA area fires, they would have been Federal. ETA: Mea goofa. Topanga Canyon State Park adjoins Pacific Palisades.
The % of land owned by the various levels of government varies by state, so trying to solve the fuel load problem will vary by state. Put another way, at the least 50 states' plus the Feds' agencies need to get ass-kicked into sane forest management policies, approval processes (= reasonably brief!), and actual action. Hamstringing the Enviros would also be necessary.
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The Dems have for something like a century at the Federal level slashed or gutted military budgets to fund social programs.
At state and city levels, Dems have begun slashing public safety - fire and police - to fund social programs, The Sacred Homeless, and support illegals.