Government spending above the level needed to create a stable, functioning civilised society is generally going to be value-destroying. If you accept that $1 in the private sector, on average, over the long-run earns a profit in excess of the cost of capital, and a marginal $1 in the government sector doesn't, then 20 years of excessive government spending is going to destroy a heck of a lot of value (at the annual rate of the productivity difference between private & public sector.) This should be especially the case now, as a lot of the stupid destructive excesses of the credit boom are not going to be repeated any time soon.
In other words, spending 100%+ of your GDP on bridges to nowhere, paper-shufflers and pork barrel projects is going to end painfully. Do that for 2 decades and it's a lot of value destruction. Less wealth/capital = lower real prices for assets.
Contrast that to the asset price gains from a private sector that gets liberated from heavy government control e.g. former communist countries going to mixed/capitalist economies, like China and the former Eastern Bloc. Although in the shorter-term some of that can be attributed to credit cycles, the long-run trend is still clearly up, growing by many multiples, and is commensurate with wealth creation in those economies.