Are Democracy and economic equality fundamentally incompatible?

[SxyxS]

Democracy and economic equality are compatible as long as you use the right regulations'which never happens and never wikl happen.
1st ) you need a gap for maximum wealth & maximum income.
You have to limit the wealth of someone to a max of eg. 50mio dollars and to limit the size of a company(eg. 3000workers or 1billion dollar prod.capacity per years max.As soon as this point is reached you have to split the company into two new units competing with each other)
Than you have to stuck the earnings of the top of the company and the bottom. =no boss should be allowed to earn more than eg. 30+ more than the guy with the lowest income.This will improve insome equality+motivate the boss.

as result you will get several smaller companies+more jobs+better quality+far more millionaires,as there are no more billionaires and this will make lobbyism almost impossible as there will be thousands of companies of a mid-size but no more behemoths.

most problem in democracies are caused by too rich people/too big banks/too big corporations as they were almost always the reasons for non-religious wars.

the main problem with your question is:
there never was a re democracy(though the swiss system is pretty close to it)
there never was economical equality(there can't be equality if you don't start under the same circumstances,but as long sons and daughter get a million legacy from their superrich fathers and as long as wars and fiat money can be printed there never will be)